AU2004325725A1

AU2004325725A1 - Fused bicycloheterocycle substituted quinuclidine derivatives

Info

Publication number: AU2004325725A1
Application number: AU2004325725A
Authority: AU
Inventors: Jianguo Ji; Tao Li; Kathleen H. Mortell; Diana L. Nersesian; Liping Pan; Michael R. Schrimpf
Original assignee: Abbott Laboratories
Current assignee: Abbott Laboratories
Priority date: 2004-12-10
Filing date: 2004-12-10
Publication date: 2006-06-22
Also published as: EP1824848A1; WO2006065233A1; JP2008523058A; CA2551486A1; CN1922176A

Description

FUSED BICYCLOHETEROCYCLE SUBSTITUTED QUINUCLIDINE DERIVATIVES Technical Field The invention relates to fused bicycloheterocycle substituted quinuclidine 5 derivatives, compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and compositions. Description of Related Technology Nicotinic acetylcholine receptors (nAChRs) are widely distributed throughout 10 the central (CNS) and peripheral (PNS) nervous systems. Such receptors play an important role in regulating CNS function, particularly by modulating release of a wide range of neurotransmitters, including, but not necessarily limited to acetylcholine, norepinephrine, dopamine, serotonin and GABA. Consequently, nicotinic receptors mediate a very wide range of physiological effects, and have been 15 targeted for therapeutic treatment of disorders relating to cognitive function, learning and memory, neurodegeneration, pain and inflammation, psychosis and sensory gating, mood and emotion, among others. Many subtypes of the nAChR exist in the CNS and periphery. Each subtype has a different effect on regulating the overall physiological function. 20 Typically, nAChRs are ion channels that are constructed from a pentameric assembly of subunit proteins. At least 12 subunit proteins, c2-alO and p2-p4, have been identified in neuronal tissue. These subunits provide for a great variety of homomeric and heteromeric combinations that account for the diverse receptor subtypes. For example, the predominant receptor that is responsible for high affinity 25 binding of nicotine in brain tissue has composition (a4) 2 (p2) 3 (the c4p2 subtype), while another major population of receptors is comprised of the homomeric (a7)5 (the a7 subtype). -1- Certain compounds, like the plant alkaloid nicotine, interact with all subtypes of the nAChRs, accounting for the profound physiological effects of this compound. While nicotine has been demonstrated to have many beneficial properties, not all of the effects mediated by nicotine are desirable. For example, nicotine exerts 5 gastrointestinal and cardiovascular side effects that interfere at therapeutic doses, and its addictive nature and acute toxicity are well-known. Ligands that are selective for interaction with only certain subtypes of the nAChR offer potential for achieving beneficial therapeutic effects with an improved margin for safety. The a7 nAChRs have been shown to play a significant role in enhancing 10 cognitive function, including aspects of learning, memory and attention (Levin, E.D., J. Neurobiol. 53: 633-640, 2002). For example, 7 nAChRs have been linked to conditions and disorders related to attention deficit disorder, attention deficit hyperactivity disorder (ADHD), Alzheimer's disease (AD), mild cognitive impairment, senile dementia, dementia associated with Lewy bodies, dementia associated with 15 Down's syndrome, AIDS dementia, Pick's Disease, as well as cognitive deficits associated with schizophrenia, among other systemic activities. The activity at the a7 nAChRs can be modified or regulated by the administration of a7 nAChR ligands. The ligands can exhibit antagonist, agonist, partial agonist, or inverse agonist properties. Thus, 7 ligands have potential in treatment of various 20 cognitive disorders. Although various classes of compounds demonstrating a7 nAChR-modulating activity exist, it would be beneficial to provide additional compounds demonstrating activity at the 7 nAChRs that can be incorporated into pharmaceutical compositions useful for therapeutic methods. Specifically, it would be beneficial to provide 25 compounds that interact selectively with a7-containing neuronal nAChRs compared to other subtypes. SUMMARY OF THE INVENTION The invention is directed to fused bicycloheterocycle substituted quinuclidine 30 compounds as well as compositions comprising such compounds, and method of using the same. Compounds of the invention have the formula: -2- X-Ari-Ar 2 )n A (I) or a pharmaceutically acceptable salt, ester, amide, or prodrug thereof, wherein: n is 0, 1, or 2; A is N or N*-0-; 5 X is selected from the group consisting of 0, S, and -N(R 1 )-; Ar is a 6-membered aromatic ring containing 0, 1, 2, 3, or 4 nitrogen atoms, wherein Ar is substituted with 0, 1, 2, 3, or 4 alkyl groups; Ar 2 is a group of the formula:

Z

1 3 ,:rz 1 4 z z z \ 2 Z eZa1 Z Z z 1l 2 N \

Y

3 Y z (a) (b) or (c) 10 Z 1 , Z 2 , Z 3 , and Z 4 are independently selected from the group consisting of C and -C(R 3 b); provided that zero or one of Z 1 , Z 2 , Z 3 , and Z 4 is C;

Z

5 , Z 6 , Z 7 , and Z 8 are independently selected from the group consisting of C and -C(R 3 b); provided that zero or one of Z 5 , Z 6 , Z 7 , and Z 8 is C; z 9 , z 1 *, zl 1 , z1 2 , Z1 3 , Z 1 4 , Z 1 5, and Z 1 6 are independently selected from the 15 group consisting of C and -C(R 3 c); provided that one of Z 9 , Z 1 0 , Z" , Z 12 , Z' 3 , Z 14 , Z 15 , and Z 16 is C and the group of formula (c) is attached to Ar through the C atom; Y' at each occurrence is independently selected from the group consisting of 0, S, -N(R 2 ), -C(R 3 ), and -C(R 3

)(R

3 a);

Y

2 is selected from the group consisting of -N(R 2 ), C(=0), -C(R 3 ), and 20 -C(R 3

)(R

3 a);

Y

3 is selected from the group consisting of -N(R 2 ), -C(R 3 ), and -3-

-C(R

3 )(Ra); provided that zero or one of Y', Y 2 , and Y 3 is -C(R 3 ) in a group of formula (a); wherein when one of Y', Y 2 , and Y 3 is -C(R 3 ) in a group of formula (a), then

Z

1 , Z 2 , Z 3 , and Z 4 are each -C(R 3 b) and the group of formula (a) is attached to Ar 5 through the C atom of -C(R 3 ) of y 1 , y 2 , or Y 3 ; and also when one of Z 1 , Z 2 , Z 3 , and Z 4 is C, then Y', Y 2 and Y 3 are other than -C(R 3 ) and the group of formula (a) is attached to Ar through the C atom of Z 1 , Z 2 , Z 3 , or Z4; y2a and y3a are independently selected from the group consisting of N, C and -C(Raa); provided that when Y' is -C(R 3 ) in a group of formula (b), y 2 a and y 3 a are 10 selected from the group consisting of N and -C(R 3 a), and when one of y2a and y 3 a is C, then Y' in a group of formula (b) is 0, S, -N(R 2 ), or -C(R 3

)(R

3 a); wherein when one of Z 5 , Z 6 , Z 7 , and Z' is C, then Y' in a group of formula (b) is selected from the group consisting of 0, S, -N(R 2 ), and -C(R 3

)(R

3 a); y 2 a and y 3 a are each independently selected from the group consisting of N and -C(R 3 a); and the 15 group of formula (b) is attached to Ar through the C of Z 5 , Z 6 , Z 7 , or Z8 ; and also wherein when Y' in a group of formula (b) is -C(R 3 ) or one of y2a and y 3 a is C, then

Z

5 , Z 6 , Z 7 , and Z' are each -C(R 3 b) and the group of formula (b) is attached to Ar through the C atom of -C(R 3 ) of y 1 in the group of formula (b) or through the C atom of y2a or y3a 20 R 1 and R 2 at each occurrence are each independently selected from the group consisting of hydrogen and alkyl;

R

3 and R 3 a at each occurrence are each independently selected from the group consisting of hydrogen, halogen, alkyl, aryl, -OR 4 , -NR 5 R , -alkyl-OR 4 , and -alkyl-NR 5

R

6 ; 25 R 3 b and R 3 c at each occurrence are each independently selected from the group consisting of hydrogen, halogen, alkyl, aryl, -OR 4 , -NR R , -alkyl-OR 4 , -alkyl-NR 5

R

6 , and -SCN;

R

4 is selected from the group consisting of hydrogen, alkyl, aryl, alkylcarbonyl, and arylcarbonyl; 30 R 5 and R 6 at each occurrence are each independently selected from the group consisting of hydrogen, alkyl, aryl, alkylcarbonyl, alkoxycarbonyl, -4aryloxycarbonyl, and arylcarbonyl, provided that at least one of R 5 and R 6 is hydrogen or alkyl; and

R

8 is selected from the group consisting of hydrogen and alkyl. Another aspect of the invention relates to pharmaceutical compositions 5 comprising compounds of the invention. Such compositions can be administered in accordance with a method of the invention, typically as part of a therapeutic regimen for treatment or prevention of conditions and disorders related to nAChR activity, and more particularly a7 nAChR activity. Yet another aspect of the invention relates to a method of selectively 10 modulating to nAChR activity, for example 7 nAChR activity. The method is useful for treating and/or preventing conditions and disorders related to a7 nAChR activity modulation in mammals. More particularly, the method is useful for conditions and disorders related to attention deficit disorder, attention deficit hyperactivity disorder (ADHD), Alzheimer's disease (AD), mild cognitive impairment, senile dementia, AIDS 15 dementia, Pick's Disease, dementia associated with Lewy bodies, dementia associated with Down's syndrome, amyotrophic lateral sclerosis, Huntington's disease, diminished CNS function associated with traumatic brain injury, acute pain, post-surgical pain, chronic pain, inflammatory pain, neuropathic pain, infertility, need for new blood vessel growth associated with wound healing, need for new blood 20 vessel growth associated with vascularization of skin grafts, and lack of circulation, more particularly circulation around a vascular occlusion, among other systemic activities. The compounds, compositions comprising the compounds, and methods for treating or preventing conditions and disorders by administering the compounds are 25 further described herein. DETAILED DESCRIPTION OF THE INVENTION Definition of Terms 30 Certain terms as used in the specification are intended to refer to the following definitions, as detailed below. -5- The term "acyl", as used herein, means an alkyl group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein. Representative examples of acyl include, but are not limited to, acetyl, 1 oxopropyl, 2,2-dimethyl-1-oxopropyl, 1-oxobutyl, and 1-oxopentyl. 5 The term "acyloxy", as used herein, means an acyl group, as defined herein, appended to the parent molecular moiety through an oxygen atom. Representative examples of acyloxy include, but are not limited to, acetyloxy, propionyloxy, and isobutyryloxy. The term "alkenyl", as used herein, means a straight or branched chain 10 hydrocarbon containing from 2 to 10 carbons and containing at least one carbon carbon double bond formed by the removal of two hydrogens. Representative examples of alkenyl include, but are not limited to, ethenyl, 2-propenyl, 2-methyl-2 propenyl, 3-butenyl, 4-pentenyl, 5-hexenyl, 2-heptenyl, 2-methyl-1-heptenyl, and 3 decenyl. 15 The term "alkoxy", as used herein, means an alkyl group as defined herein, appended to the parent molecular moiety through an oxygen atom. Representative examples of alkoxy include, but are not limited to, methoxy, ethoxy, propoxy, 2 propoxy, butoxy, tert-butoxy, pentyloxy, and hexyloxy. The term "alkoxyalkoxy", as used herein, means an alkoxy group, as defined 20 herein, appended to the parent molecular moiety through another alkoxy group, as defined herein. Representative examples of alkoxyalkoxy include, but are not limited to, tert-butoxymethoxy, 2-ethoxyethoxy, 2-methoxyethoxy, and methoxymethoxy. The term "alkoxyalkyl", as used herein, means an alkoxy group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined 25 herein. Representative examples of alkoxyalkyl include, but are not limited to, tert butoxymethyl, 2-ethoxyethyl, 2-methoxyethyl, and methoxymethyl. The term "alkoxycarbonyl", as used herein, means an alkoxy group, as defined herein, appended to the parent molecular moiety through a carbonyl group, represented by -C(O)-, as defined herein. Representative examples of 30 alkoxycarbonyl include, but are not limited to, methoxycarbonyl, ethoxycarbonyl, and tert-butoxycarbonyl. -6- The term "alkoxyimino", as used herein, means an alkoxy group, as defined herein, appended to the parent molecular moiety through an imino group, as defined herein. Representative examples of alkoxyimino include, but are not limited to, ethoxy(imino)methyl and methoxy(imino)methyl. 5 The term "alkoxysulfonyl", as used herein, means an alkoxy group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein. Representative examples of alkoxysulfonyl include, but are not limited to, methoxysulfonyl, ethoxysulfonyl and propoxysulfonyl. The term "alkyl", as used herein, means a straight or branched chain 10 hydrocarbon containing from 1 to 6 carbon atoms. Representative examples of alkyl include, but are not limited to, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, iso-butyl, tert-butyl, n-pentyl, isopentyl, neopentyl, and n-hexyl. The term "alkylcarbonyl", as used herein, means an alkyl group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as 15 defined herein. Representative examples of alkylcarbonyl include, but are not limited to, acetyl, 1-oxopropyl, 2,2-dimethyl-1-oxopropyl, 1-oxobutyl, and 1-oxopentyl. The term "alkylcarbonyloxy", as used herein, means an alkylcarbonyl group, as defined herein, appended to the parent molecular moiety through an oxygen atom. Representative examples of alkylcarbonyloxy include, but are not limited to, 20 acetyloxy, ethylcarbonyloxy, and tert-butylcarbonyloxy. The term "alkylsulfonyl", as used herein, means an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein. Representative examples of alkylsulfonyl include, but are not limited to, methylsulfonyl and ethylsulfonyl. 25 The term "alkylthio", as used herein, means an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfur atom. Representative examples of alkylthio include, but are not limited, methylthio, ethylthio, tert-butylthio, and hexylthio. The term "alkynyl", as used herein, means a straight or branched chain 30 hydrocarbon group containing from 2 to 10 carbon atoms and containing at least one -7carbon-carbon triple bond. Representative examples of alkynyl include, but are not limited, to acetylenyl, 1-propynyl, 2-propynyl, 3-butynyl, 2-pentynyl, and 1-butynyl. The term "amido", as used herein, means an amino, alkylamino, or dialkylamino group appended to the parent molecular moiety through a carbonyl 5 group, as defined herein. Representative examples of amido include, but are not limited to, aminocarbonyl, methylaminocarbonyl, dimethylaminocarbonyl, and ethylmethylaminocarbonyl. The term "aryl", as used herein, means a monocyclic or bicyclic aromatic ring system. Representative examples of aryl include, but are not limited to, phenyl and 10 naphthyl. The aryl groups of this invention are substituted with 0, 1, 2, 3, 4, or 5 substituents independently selected from acyl, acyloxy, alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxyimino, alkoxysulfonyl, alkyl, alkylsulfonyl, alkynyl, amino, carboxy, cyano, formyl, haloalkoxy, haloalkyl, halo, 15 hydroxy, hydroxyalkyl, mercapto, nitro, thioalkoxy, -NRARB, (NRARB)alkyl, (NRARB)alkoxy, (NRARB)carbonyl, and (NRARB)Sulfonyl. The term "arylcarbonyl", as used herein, means an aryl group, as defined herein, or a benzyl group appended to the parent molecular moiety through a carbonyl group, represented by -C(O)-, as defined herein. Representative examples 20 of arylcarbonyl include, but are not limited to, phenylcarbonyl and benzylcarbonyl. The term "aryloxycarbonyl", as used herein, means an aryl-O- group, wherein the aryl of aryl-O- is as defined herein, or a benzyoxyl group appended to the parent molecular moiety through a carbonyl group, represented by -C(O)-, as defined herein. Representative examples of aryloxycarbonyl include, but are not limited to, 25 phenoxycarbonyl and benzyloxycarbonyl. The term "arylsulfonyl", as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein. Representative examples of arylsulfonyl include, but are not limited to, phenylsulfonyl, (methylaminophenyl)sulfonyl, (dimethylaminophenyl)sulfonyl, and 30 (naphthyl)sulfonyl. The term "carbonyl", as used herein, means a -C(O)- group. -8- The term "carboxy", as used herein, means a -CO 2 H group. The term "cyano", as used herein, means a -CN group. The term "formyl", as used herein, means a -C(O)H group. The term "halo" or "halogen", as used herein, means -Cl, -Br, -1 or -F. 5 The term "haloalkoxy", as used herein, means at least one halogen, as defined herein, appended to the parent molecular moiety through an alkoxy group, as defined herein. Representative examples of haloalkoxy include, but are not limited to, chloromethoxy, 2-fluoroethoxy, trifluoromethoxy, and pentafluoroethoxy. The term "haloalkyl", as used herein, means at least one halogen, as defined 10 herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of haloalkyl include, but are not limited to, chloromethyl, 2-fluoroethyl, trifluoromethyl, pentafluoroethyl, and 2-chloro-3 fluoropentyl. The term "heteroaryl" means an aromatic five- or six-membered ring 15 containing 1, 2, 3, or 4 heteroatoms independently selected from nitrogen, oxygen, or sulfur. The heteroaryl groups are connected to the parent molecular moiety through a carbon or nitrogen atom. Representative examples of heteroaryl include, but are not limited to, furyl, imidazolyl, isoxazolyl, isothiazolyl, oxadiazolyl, oxazolyl, pyrazinyl, pyrazolyl, pyridazinyl, pyridinyl, pyrimidinyl, pyrrolyl, tetrazolyl, thiadiazolyl, 20 thiazolyl, thienyl, triazinyl, and triazolyl. The heteroaryl groups of the invention are substituted with 0, 1, 2, or 3 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylsulfonyl, alkylthio, alkynyl, carboxy, cyano, formyl, haloalkoxy, haloalkyl, halo, hydroxy, 25 hydroxyalkyl, mercapto, nitro, -NRARB, (NRARB)alkyl, (NRARB)alkoxy, (NRARB)carbonyl, and (NRARB)Sulfonyl. The term "bicyclic heteroaryl" refers to fused aromatic nine- and ten membered bicyclic rings containing 1, 2, 3, or 4 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or a tautomer thereof. The bicyclic heteroaryl 30 groups are connected to the parent molecular moiety through a carbon or nitrogen atom. Representative examples of bicyclic heteroaryl rings include, but are not -9limited to, indolyl, benzothiazolyl, benzofuranyl, isoquinolinyl, and quinolinyl. Bicyclic heteroaryl groups of the invention are substituted with 0, 1, 2, or 3 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylsulfonyl, 5 alkylthio, alkynyl, carboxy, cyano, formyl, haloalkoxy, haloalkyl, halo, hydroxy, hydroxyalkyl, mercapto, nitro, -NRARB, (NRARB)alkyl, (NRARB)alkoxy, (NRARB)carbonyl, and (NRARB)Sulfonyl. The term "hydroxy", as used herein, means an -OH group. The term "hydroxyalkyl", as used herein, means at least one hydroxy group, 10 as defined herein, is appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of hydroxyalkyl include, but are not limited to, hydroxymethyl, 2-hydroxyethyl, 3-hydroxypropyl, 2,3-dihydroxypentyl, and 2-ethyl-4-hydroxyheptyl. The term "mercapto", as used herein, means a -SH group. 15 The term "nitro", as used herein, means a -NO 2 group. The term "-NRARB", as used herein, means two groups, RA and RB, which are appended to the parent molecular moiety through a nitrogen atom. RA and RB are each independently hydrogen, alkyl, alkylcarbonyl, or formyl. Representative examples of -NRARB include, but are not limited to, amino, methylamino, 20 acetylamino, and acetylmethylamino. The term "(NRARB)alkyl", as used herein, means a -NRARB group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of (NRARB)alkyl include, but are not limited to, (amino)methyl, (dimethylamino)methyl, and (ethylamino)methyl. 25 The term "(NRARB)alkoxy", as used herein, means a -NRARB group, as defined herein, appended to the parent molecular moiety through an alkoxy group, as defined herein. Representative examples of (NRARB)alkoxy include, but are not limited to, (amino)methoxy, (dimethylamino)methoxy, and (diethylamino)ethoxy. The term "(NRARB)carbonyl", as used herein, means a -NRARB group, as 30 defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein. Representative examples of (NRARB)carbonyl include, but are not -10limited to, aminocarbonyl, (methylamino)carbonyl, (dimethylamino)carbonyl, and (ethylmethylamino)carbonyl. The term "(NRARB)Sulfonyl", as used herein, means a -NRARB group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, 5 as defined herein. Representative examples of (NRARB)Sulfonyl include, but are not limited to, aminosulfonyl, (methylamino)sulfonyl, (dimethylamino)sulfonyl, and (ethylmethylamino)sulfonyl. The term "sulfonyl", as used herein, means a -S(0) 2 - group. The term "thioalkoxy", as used herein, means an alkyl group, as defined 10 herein, appended to the parent molecular moiety through a sulfur atom. Representative examples of thioalkoxy include, but are no limited to, methylthio, ethylthio, and propylthio. Although typically it may be recognized that an asterisk is used to indicate that the exact subunit composition of a receptor is uncertain, for example a3b4* indicates 15 a receptor that contains the a3 and p4 proteins in combination with other subunits, the term a7 as used herein is intended to include receptors wherein the exact subunit composition is both certain and uncertain. For example, as used herein a7 includes homomeric (a7)5 receptors and ax7* receptors, which denote a nAChR containing at least one a7 subunit. 20 Compounds of the Invention Compounds of the invention can have the formula (1) as described above. More particularly, compounds of formula (1) can include, but are not limited to, compounds wherein Arl is a group of the formula: 25 -11- 1 - 3 x x x2 4 (b) In a group of formula (b), X 1 , X 2 , X 3 , and X 4 are each independently selected from the group consisting of N and -CR 10 , wherein Ri 0 at each occurrence is independently selected from the group consisting of hydrogen and alkyl. Preferably, 5 at least one of X 1 , X 2 , X 3 , and X 4 is -CR 0 , such that group of formula (b) contains 0, 1, 2, or 3 nitrogen atoms. Specific examples of groups for Ar are, for example, R 10 R 10 R 10 R 10 Rio N N N R 10 R 0 RR RoRio R 1 0 N and N-N N, 10 R10 and the like. Specific examples of groups for Ar2 in a compound of formula (1) are, for example, -12-

R

2 a z 5 s Y3a N N N 7 a/ N~ 7 Z / z6"" 3a 8 Y 3a 5 N 3a z ,5 , 3a Z (i0)() (iv) R 2 z 5 Z 5 Z O 2 Z Z N Z6 S\ Z7* Z 7Z N 6 " Ya y2a N~ Z , Z Z Z (v) (vi) (vii) 0 H N SZB N Z (viii) (ix) Z Z N 26 Z5 N N ZI N and N W(xi) 5 wherein: ZI, Z 2 , Z 3 , and Z 4 are independently selected from the group consisting of C and -C(R 3 b); provided that one of Z 1 , Z 2 , Z 3 , and Z 4 is C and formula (ix) is attached to Ar' through the C atom of ZI, Z 2 , Z 3 , and Z 4 ; Y' is selected from the group consisting of 0, S, and -C(R 3

)(R

3 a); 10 Z 5 , Z 6 , Z 7 , and Z 8 are independently selected from the group consisting of C and -C(R 3 b); provided that zero or one of Z 5 , Z 6 , Z 7 , and Z 8 is C; -13y2a and y3a are independently selected from the group consisting of C and C(R 3 a); wherein when one of Z 5 , Z 6 , Z 7 , and Z 8 is C, then y2a and y3a in the group of formulae (i)-(vii) are each -C(R 3 a); and each of the group of formulae (i)-(vii) is attached to Ar' through the C of Z 5 , Z 6 , Z 7 , or Z 8 ; and also wherein when one of y2a 5 and y 3 a is C in the group of formulae (i)-(vii), then Z 5 , Z 6 , Z 7 , and Z 8 are each -C(R 3 b) and each of the group of formulae (i)-(vii) is attached to Ar through the C atom of y2a or y3a; and R 2 , R 3 , R3a and R 3 b are as defined for a compound of formula (1). Also, other specific examples of groups for Ar 2 in a compound of formula (1) are, for example, 1 4 Z 1 3 - Z Z i z15 Z Z12 N 10 R 8 wherein Z 9 , Z 10 , Z 11 , Z 12 , Z 13 , Z 14 , Z1 5 , Z 16 , and R' are as defined for compounds of formula (1). Specific embodiments contemplated as part of the invention include, but are not limited to, compounds of formula (1), as defined, wherein: 15 3-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 4-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 5-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 5-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-1 H-indole; 6-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 20 2-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 5-[6-(1 -azabicyclo[2.2.2]oct-3-yloxy)pyridazin-3-y]-1 H-indole; 4-[6-(1 -azabicyclo[2.2.2]oct-3-yloxy)pyridazin-3-yl]-1 H-indole; 5-{6-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyridazin-3-yl}-1 H-indole; 5-{6-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyridazin-3-yl}-3-methyl-1 H-indole; 25 5-{2-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyrimidin-5-yl}-1 H-indole; 4-{2-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyrimidin-5-y)-1 H-indole; -14- 5-{2-[(3S)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyrimidin-5-yl}-1 H-indole; 5-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-3-methyl-1 H-indazole; 6-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1,3-benzothiazol-2-amine; 6-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-1,3-benzothiazol-2-amine; 5 6-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-4-thiocyanato-1,3 benzothiazol-2-amine; 6-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-4-bromo-1,3-benzothiazol-2 amine; N-[4-(3-methyl-1 H-indazol-5-yl)phenyl]quinuclidin-3-amine; 10 (R)-3-[6-(3-methyl-1 H-indazol-5-yl)-pyridazin-3-yloxy]-1 -aza bicyclo[2.2.2]octane; (R)-3-[6-(1-methyl-1 H-indol-5-yl)-pyridazin-3-yloxy]-1 -aza bicyclo[2.2.2]octane; (R)-{5-[6-(1 -aza-bicyclo[2.2.2]oct-3-yloxy)-pyridazin-3-yl]-1 H-indol-3-ylmethyl} 15 dimethyl-amine; (R)-3-[6-(1H-indol-5-yl)-pyridazin-3-yloxy]-1-aza-bicyclo[2.2.2]octane 1-oxide; 6-{6-[(3R)-1 -aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-yl}-benzothiazol-2 ylamine; (3R)-3-[6-(3-bromo-1 H-indol-5-yl)-pyridazin-3-yloxy]-1 -aza 20 bicyclo[2.2.2]octane; 5-{6-[(3R)-1 -aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-yl}-1,3-dihydro-indol-2 one; 5-{6-[(3R)-1 -oxy-1 -aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-yl}-1,3-dihydro indol-2-one; 25 5-{6-[(3R)-1 -aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-yl}-1,3-dihydro benzoimidazol-2-one; (R)-3-[6-(1 H-benzoimidazol-5-yl)-pyridazin-3-yloxy]-1 -aza bicyclo[2.2.2]octane; (S)-3-[6-(1 H-indol-5-yI)-pyridazin-3-yloxy]-1 -aza-bicyclo[2.2.2]octane; 30 (R)-3-[5-(1 H-indol-5-yI)-pyridin-2-yloxy]-1 -aza-bicyclo[2.2.2]octane; -15- (3R)-3-[5-(1H-indol-4-yl)-pyrimidin-2-yloxy]-1-aza-bicyclo[2.2.2]octane 1 oxide; (3R)-3-(5-benzooxazol-5-yl-pyrimidin-2-yloxy)-1 -aza-bicyclo[2.2.2]octane; (3R)-3-[5-(2-methyl-benzooxazol-5-yl)-pyrimidin-2-yloxy]-1 -aza 5 bicyclo[2.2.2]octane; (3R)-3-[5-(2-ethyl-benzooxazol-5-yl)-pyrimidin-2-yloxy]-1 -aza bicyclo[2.2.2]octane; (3R)-3-[5-(2-phenyl-benzooxazol-5-yl)-pyrimidin-2-yloxy]-1 -aza bicyclo[2.2.2]octane; 10 (R)-5-[2-(1 -aza-bicyclo[2.2.2]oct-3-yloxy)-pyrimidin-5-yl]-3H-benzooxazol-2 one; (R)-3-[6-(1 -aza-bicyclo[2.2.2]oct-3-yloxy)-pyridazin-3-yl]-9H-carbazole; 3-[6-(1 H-indol-3-yl)-pyridazin-3-yloxy]-1-aza-bicyclo[2.2.2]octane; (R)-3-[6-(1H-indol-3-yl)-pyridazin-3-yloxy]-1-aza-bicyclo[2.2.2]octane; and 15 (S)-3-[6-(1 H-indol-3-yl)-pyridazin-3-yloxy]-1 -aza-bicyclo[2.2.2]octane; or pharmaceutically acceptable salts, esters, amides, and prodrugs thereof. Compound names are assigned by using AUToNOM naming software, which is provided by MDL Information Systems GmbH (formerly known as Beilstein Informationssysteme) of Frankfurt, Germany, and is part of the CHEMDRAW@ 20 ULTRA v. 6.0.2 software suite. Compounds of the invention may exist as stereoisomers wherein, asymmetric or chiral centers are present. These stereoisomers are "R" or "S" depending on the configuration of substituents around the chiral element. The terms "R" and "S" used herein are configurations as defined in IUPAC 1974 Recommendations for Section 25 E, Fundamental Stereochemistry, Pure Appl. Chem., 1976, 45: 13-30. The invention contemplates various stereoisomers and mixtures thereof and are specifically included within the scope of this invention. Stereoisomers include enantiomers and diastereomers, and mixtures of enantiomers or diastereomers. Individual stereoisomers of compounds of the invention may be prepared synthetically from 30 commercially available starting materials which contain asymmetric or chiral centers or by preparation of racemic mixtures followed by resolution well-known to those of -16ordinary skill in the art. These methods of resolution are exemplified by (1) attachment of a mixture of enantiomers to a chiral auxiliary, separation of the resulting mixture of diastereomers by recrystallization or chromatography and optional liberation of the optically pure product from the auxiliary as described in 5 Furniss, Hannaford, Smith, and Tatchell, "Vogel's Textbook of Practical Organic Chemistry", 5th edition (1989), Longman Scientific & Technical, Essex CM20 2JE, England, or (2) direct separation of the mixture of optical enantiomers on chiral chromatographic columns or (3) fractional recrystallization methods. Compounds of the invention demonstrate beneficial binding at a7 neuronal 10 nicotinic receptors. Moreover, such compounds generally demonstrate more beneficial binding at a7 neuronal nicotinic receptors when compared with a less desireable effect of binding to the human ether-a-go-go related gene (hERG) ion channel. As such, compounds of the invention demonstrate an improved cardiovascular profile, i.e. are less like to to induce cardiovascular complications 15 associated with hERG, than other ampiphilic molecules demonstrating at a7 neuronal nicotinic receptor binding. Methods for Preparing Compounds of the Invention As used in the descriptions of the schemes and the examples, certain 20 abbreviations are intended to have the following meanings: Ac for acetyl; Bu for butyl; dba for dibenzylidene acetone; DEAD for diethyl azodicarboxylate; DMSO for dimethylsulfoxide; EtOAc for ethyl acetate; EtOH for ethanol; Et 3 N for triethylamine; Et 2 0 for diethyl ether; HPLC for high pressure liquid chromatography; 'Pr for isopropyl; Me for methyl; MeOH for methanol; NBS for N-bromosuccinimide; OAc for 25 acetoxy; o-tol. for o-toluene; Ph for phenyl; t-Bu for tert-butyl; TFA for trifluoroacetic acid; and THF for tetrahydrofuran. The reactions exemplified in the schemes are performed in a solvent appropriate to the reagents and materials employed and suitable for the transformations being effected. The described transformations may require 30 modifying the order of the synthetic steps or selecting one particular process scheme -17over another in order to obtain a desired compound of the invention, depending on the functionality present on the molecule. Nitrogen protecting groups can be used for protecting amine groups present in the described compounds. Such methods, and some suitable nitrogen protecting 5 groups, are described in Greene and Wuts (Protective Groups In Organic Synthesis, Wiley and Sons, 1999). For example, suitable nitrogen protecting groups include, but are not limited to, tert-butoxycarbonyl (Boc), benzyloxycarbonyl (Cbz), benzyl (Bn), acetyl, and trifluoracetyl. More particularly, the Boc protecting group may be removed by treatment with an acid such as trifluoroacetic acid or hydrochloric acid. 10 The Cbz and Bn protecting groups may be removed by catalytic hydrogenation. The acetyl and trifluoracetyl protecting groups may be removed by a hydroxide ion. The methods described below can entail use of various enantiomers. Where the stereochemistry is shown in the Schemes, it is intended for illustrative purposes only. -18- Scheme 1 HO I>ss+OH X-Ar 2 11;r-X in",, (6) X'=Br,CI, I Ph 3 P X'BrCI, 1 (3) DEAD OH I Cul, Cs 2

CO

3 0 Me 3 SnSnMe 3 _ _ X or O + Ar-xO + 1,10-phenanthroline BB*O Tol. reflux N RO' OR (1) (2) (4) (9) R= alkyl, aryl X'=Br,CI, I Me 3 SnSnMe 3 or RO'- BOR Pd(O)/L. (7) RO' B-B 'OR (9) Pd(O)/L. (9) R=alkyl, aryl 0 XX'-Ar 2 Ar Ar -M(6) N Pd(O)/L. N X CX,=BrC, 1 (8) Quinuclidine ethers of general formula (8), wherein Ar 1 and Ar 2 are as defined 5 in formula (1), can be prepared as described in Scheme 1. 3-Quinuclidinol of formula (1) is treated with a halophenyl iodide of formula (2), wherein X is bromide, chloride, or iodide, with GuI and CS 2

CO

3 in 1, 10-phenanthroline as described in Org. Lett., 2002, 4, 973, to obtain a halophenoxy quinuclidine of formula (4). Alternatively, a compound of formula can be obtained by treating 3-quinuclidinol with a halo phenyl 10 alcohol of formula (3), wherein X is bromide, chloride, or iodide, and diethyl azodicarboxylate in the presence of a phosphine, such as triphenylphosphine. Compounds of formula (4) can be treated with hexamethylditin or diboron of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, wherein R is hydrogen, alkyl, butyloxycarbonyl, or benzyloxycarbonyl, in the presence of a 15 palladium catalyst to provide the corresponding tin or boronic acid of formula (5), which is reacted with a desired halide of a fused bicycloheterocycle represented by Ar2 of formula (6), wherein Xis bromide, chloride, or iodide, to provide compounds of formula (8). Alternatively, halides of a desired Ara group can be treated with -19hexamethylditin or diboron of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, in the presence of a palladium catalyst to provide a corresponding tin or boronic acid reagent that is reacted with a compound of formula (4) in the presence of a palladium catalyst to provide a compound of formula (8). 5 Scheme 2 Me 3 SnSnMe 3 or RO, BBOR , B-B'OR R=alkyl, aryl 'OR x OK Y x l O X RO 0) / N N, 4 jk- 2

C

4 ; NJ X4" 1 2 Pd(O)/L.N M Yl, Y 2 =Br, CI, I (12) M=Sn, B (10) X 1 , X 3 , X 4 =N, CH (13) (11) X'--Ar2 M-Ar2 Pd()/L. X'=BrCI, I (7) (6) M=Sn, B, Q-0

X

1 O A<r2 (14) Quinuclidine ethers of formula (14), wherein Ar is a nitrogen-containing 10 heteroaryl, for example pyridazine, and Ar2 is as defined for formula (1), can be prepared as shown in Scheme 2. Potassium quinuclidinoxide (10) can be reacted with a dihaloaromatic ring, for example, dichloropyridazine, of formula (11) to obtain a quinuclidine ether of formula (12). The quinuclidine ether can be reacted with a suitable tin or boron reagent, as described in Scheme 1, to provide a fused 15 bicycloheterocycle substituted quinuclidine ether of formula (14). Alternatively, the quinuclidine ether of formula (12) can be treated with hexamethylditin or diboron of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, to activate the aromatic group to provide (13), wherein M is tin or boronic acid ester, and further -20treated with a halide of a desired group Ar 2 in the presence of a palladium catalyst to provide compounds of formula (14). Scheme 3 O Ar-I (17) ZA-r + OH Pd(O)/L. N-Ar2 M-Ar 2 ao (18) Cul, Cs 2

CO

3 R O1,10-phenanthroline (7) Ar RaO Tol. reflux M=Sn, B, 19 Ra=Bn R Ar -Ar 2 Pd(0)/L. (20) I Pd/C, H 2 OH HO Ph 3 P, DEAD 0 + -Ar2 THF, rt, 2 days Ar2 5 (21) (8) Quinuclidine ethers of formula (8), wherein Ar' and Ar2 are as defined for formula (1) also can be obtained by the methods described in Scheme 3. The activated tin or boronic acid reagent of formula (7) can be coupled with the diiodoaromatic ring of formula (17) in the presence of a palladium catalyst to provide 10 a compound of formula (18). Compounds of formula (18) can be reacted with 3 quinuclidinol and Cul with Cs 2

CO

3 in 1,10-phenanthroline as described in Org. Lett. 2002, 4, 973, to provide a desired compound of formula (8). Alternatively, the compound of formula (7) is treated with a compound of formula (19), wherein Ra is benzyl, in the presence of a palladium catalyst to provide 15 a compound of formula (20). Compounds of formula (20), wherein Ra is benzyl, are hydrogenated to provide compounds of formula (21) under standard hydrogenation conditions, for example Pd/C, and further treated with 3-quinuclidinol in the presence of a phosphine, for example triphenylphosphine, and diethyl azodicarboxylate to provide compounds of formula (8). -21- Scheme 4

NH

2 Y'=Br, I (27) (28) X'=Br,C,I Pd/Ligand Cs 2

CO

3 , tol. NaBH(OAc) 3 H Pd(O)/L. H H N HOAc,Na 2

SO

4 N RO -,0RN Q~O 2 NlAr1l~X or7 N~ or N N RO.. ,-"OR N X'=Br,CI,1 RO' OR (30) M'=Sn, B (25) (26) (29) (9) R=alkyl, aryl Pd(0)/L. Pd(O)/L X'- Ar 2 M-Ar(6) (7) X'=Br,CI, I M=Sn, B, H Q N--Ar2 (31) Compounds of formula (31), wherein X is -NH- and Ar and Ar 2 are as 5 described for compounds of formula (1), can be prepared as shown in Scheme 4. 3 Quinuclidinone (25) and a haloarylamine of formula (26), wherein X' is bromide, chloride, or iodide, can be treated with sodium triacetoxy borohydride and acetic acid in Na 2

SO

4 to provide a compound of formula (29). Alternatively, a compound of formula (29) can be obtained by treating 3-aminoquinuclidine (27) with haloaromatic 10 group as described in formula (28) with Cs 2

CO

3 in the presence of palladium catalyst, preferably in toluene. A compound of formula (29) can be treated with a tin or diboron of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, under conditions previously described to provide the corresponding tin or boronic acid reagent of formula (30), which can be reacted with -22the halide of a desired group represented by Ar 2 in a compound of formula (1) to provide a compound of formula (31). Alternatively, the compound of formula (29) is treated with a tin or boronic acid ester of the desired Ar2 group in the presence of a palladium catalyst to provide a compound of formula (31). 5 Scheme 5 Me 3 SnSnMe 3 RO, or ,OR SH B-BOR CI 1) NaH, DMF S RO( / rI (9) N7 Pd(0)/L. N HCI 2) Chiral separation N (37) (38) X'=Br,CI, IR=alkyl, aryl M=Sn, B (35) (36) M-Ar 2 Pd(0)/L. X'-Ar 2 (7) Pd(0)/L. (6) M=Sn, B, X'=Br,Cl, I SA--Ar 2 N (39) Compounds of formula (39), wherein X is S and Ar' and Ar2 are as defined in a compound of formula (1), can be prepared as shown in Scheme 5. 3 10 Chloroquinuclidine (35) can be reacted with a haloarylthiol of formula (36), wherein X is bromide, chloride, or iodide, to provide a compound of formula (37). The compound of formula (37) can be treated with a tin or boron reagent of a desired group for Ar2 as described for a compound of formula (1) to provide a compound of formula (39). Alternatively, the compound of formula (37) can be reacted with a 15 hexamethylditin or diboron reagent of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, in the presence of a palladium catalyst to provide a compound of formula (38), which is reacted with the halide of a desired Ar2 group in the presence of a palladium catalyst to provide a compound of formula (39). -23- Scheme 6 Me 3 SnSnMe 3 or RO, -OR RO' OR Or Pd(O)/L. O M N X R=alkyl, aryl N M (4) X=Br,CI, I (5) M=Sn, B Pd(0)/L. Pd(O)/L. X'-Ar 2 -NHRb M'-Ar 2 -NHRb ( 1 (41) (40) X=r I M'=Sn, B, Zn, Mg, X'=Br, CI, I Rb=H, alkyl, Boc, Cbz Q O0 r Ar 2 *'NNHRb (42) Compounds of formula (42), wherein X is 0, R 3 is NHRb, and Arl, Ar 2 are 5 defined as in compounds of formula (1), can be prepared as shown in Scheme 6. Compounds of formula (4) obtained as shown in Scheme 1 can be treated with a metal of the desired amino-substituted Ar2 group, as described for compounds of formula (1) to provide compounds of formula (42), wherein Rb is hydrogen, alkyl, butyloxycarbonyl, or benzyloxycarbonyl. Compounds of formula (4) can be treated 10 with a hexamethylditin or diboron reagent of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, in the presence of a palladium catalyst to provide the corresponding tin or boronic acid of formula (5), which is reacted with a desired halide of an amine-substituted fused bicycloheterocycle represented by Ar2 of formula (41), wherein X' is bromide, chloride, or iodide, to 15 provide compounds of formula (42). -24- Scheme 7 Me 3 SnSnMe 3 or RO, B-OR OY XI 3 RO ' OR x3 CN : ' , 4j Y Pd(O)/L. N N x 4 iM (12) R=alkyl, aryl M=Sn, B X', X 2 ,, X 3 =N, CH (13) Y=Br, CI, I Pd(O)/L. Pd(O)/L. M'-Ar 2 -NHRb X'-Ar 2 -NHRb (45) (46) M'=Sn, B, Zn, Mg, X'=Br, CI, I Rb=H, BocCbz, alkyl, aryl 0 X1 O X$X Ar 2 - NHRb (47) Compounds of formula (47), wherein X is 0, Ar is a nitrogen containing aromatic group, for example pyridazine, R 3 is NHRb, as previously defined, and Ar 2 is 5 defined as in compounds of formula (1), can be prepared as shown in Scheme 7. Compounds of formula (12), which can be obtained as shown in Scheme 2, are treated with a metal of the desired amino-substituted Ar2 group, as described for compounds of formula (1), of formula (45) to provide compounds of formula (47). Compounds of formula (12) also can be treated with a hexamethylditin or diboron 10 reagent of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, in the presence of a palladium catalyst to provide the corresponding tin or boronic acid of formula (13), which is reacted with a desired halide of an amine-substituted fused bicycloheterocycle represented by Ar2 of formula (46), wherein X is bromide, chloride, or iodide, to provide compounds of formula (47). 15 -25- Scheme 8 I Ar-Ar 2 -X" + OH X"=Br,Ci,I,NO 2 ,NR'R" (51) Cul, Cs 2

CO

3 1,10-phenanthroline Tol. reflux ,O,,H HO Ph 3 P, DEAD O -Ar2- 7) + -- A2-" THF, rt, 2 daysN N (52) (50) X"=Br,CI,,NO 2 ,NR'R"

X"=NO

2 X=CI, Br, i 1) Pd/C, H 2 2) R'C or RBr Pd/Ligand, RNHR" (53) (54) +A IAr-)C IF Ar 2 2 ay N N NHR' (57) NR'R (56) R', R"=H, alkyl, aryl, RCO, Boc, Cbz Quinuclidine ethers of formula (56) and (57), wherein Ar is as defined for 5 formula (1) and Ar 2 is substituted with a group NR 5

R

6 can be obtained by the methods described in Scheme 8. Compounds of formula (50) can be treated with 3 quinuclidinol in the presence of a phosphine, for example triphenylphosphine, and diethyl azodicarboxylate to provide compounds of formula (52). Alternatively, -26compounds of formula (51), wherein X" is bromide, chloride, or iodide, can be reacted with Cul, Cs 2

CO

3 in 1,10-phenanthroline as described in Org. Lett. 2002, 4, 973, to provide a desired compound of formula (52). Compounds of formula (52), wherein X" is NO 2 , can be reduced with hydrogen in the presence of a palladium 5 catalyst and reacted with a chloride or bromide of a desired R group of formula (53), wherein R' is hydrogen, alkyl, aryl, alkycarbonyl, alkoxycarbonyl, arylcarbonyl, or aryloxycarbonyl, to provide compounds of formula (56). Compounds of formula (52), wherein X" is bromide, chloride, or iodide, can be treated with a compound R'NHR" of formula (54), wherein R' and R" are as previously described for R' in compounds 10 of formula (53), to provide a corresponding compound of formula (57). Scheme 9 1)NaBH(OAc) 3 H 0 H 2 N -Ar 2 -X" HOAc,Na 2

SO

4 N -Ar2-X" (N 2) Chiral separation N (60) X"=Br,CI,I,NO 2 ,NHR'R" (61) X=BrCl LPd/igand, R'NHR" (54) X'=N0 2 1) Pd/C, H 2 | Ar -Ar2-NRR" 2) R'CI or RBr N (53) (64) R', R"=H, alkyl, aryl, RCO, Boc, Cbz H N NA -Ar 2 -NHR' N (63) Compounds of formulas (63) and (64) can be prepared as shown in Scheme 15 9. 3-Quinuclidinone and a halobiarylamine of formula (60), wherein Xis bromide, chloride, or iodide, can be treated with sodium triacetate borohydride and Na 2

SO

4 in -27acetic acid to provide a compound of formula (61) as described in Tetrahedron Lett. 1996, 37, 6045. Compounds of formula (61), wherein X is bromide, chloride, or iodide, can be treated with a compound R'NHR" of formula (54), wherein R' and R" are as previously described for R' in compounds of formula (53), to provide a 5 corresponding compound of formula (64). Compounds of formula (61), wherein X is

NO

2 , can be reduced with hydrogen in the presence of a palladium catalyst and reacted with a chloride or bromide of a desired R' group of formula (53), wherein R' is hydrogen, alkyl, aryl, alkycarbonyl, alkoxycarbonyl, arylcarbonyl, or aryloxycarbonyl, to provide compounds of formula (63). 10 Scheme 10 Me 3 SnSnMe 3 or RO, -OR RO' OR H H ~ (9)N NI-X Pd(0)/L. N r -- M N (29) R=alkyl, aryl (30) M=Sn, B X'=Br, CI, I Pd(0)/L. Pd(0)/L. X-Ar 2 -NHRb M'-Ar 2 -NHRb (46) (45) X=Br, CI, I M'=Sn, B, Zn, Mg, Rb=H, Boc,Cbz, alkyl, ary H S N I A-Ar 2 -NHRb (69) Compounds of formula (69), wherein X is -NH-, R 3 is NHRb, and Ar', Ar 2 are defined as in compounds of formula (1), can be prepared as shown in Scheme 10. 15 Compounds of formula (29) obtained as shown in Scheme 7 can be treated with a -28metal of the desired amino-substituted Ar 2 group, as described for compounds of formula (1), of formula (45) to provide compounds of formula (69). Compounds of formula (29) also can be treated with a hexamethylditin or diboron reagent of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, in the presence of a 5 palladium catalyst to provide the corresponding tin or boronic acid of formula (30), which is reacted with a desired halide of an amine-substituted fused bicycloheterocycle represented by Ar2 of formula (46), wherein X' is bromide, chloride, or iodide, to provide compounds of formula (69). 10 Scheme 11 ci SH CIASH 1) NaH, DMF , C + X N 2) Chiral separation N (70) (71) X"=Br,CI,I,NO 2 ,NHR'R" X=N0 2 X=NO2 X=Br,Cl,l 1) Pd/C, H 2 2) R'CI or R'Br (53) Pd/Ligand R'NHR" (54) ~y) Ar N Ar 2 -NHR' (72) iyS N Ar 2 -NR'R" (73) Quinuclidine biarylsulfides of formulas (72) and (73), wherein Ar is as defined for formula (1) and Ar2 is substituted with a group NR'R" can be obtained by the methods described in Scheme 11. 3-Chloroquinuclidine can be reacted with a 15 halobiarylthiol of formula (70), wherein X" is bromide, chloride, iodide, NO 2 , or NHR'R", as described in Tetrahedron Lett. 1996, 37, 6045, to provide a compound of formula (71). Compounds of formula (71), wherein X" is NO 2 , can be reduced with -29hydrogen in the presence of a palladium catalyst and reacted with a chloride or bromide of a desired R' group of formula (53), wherein R' is hydrogen, alkyl, aryl, alkycarbonyl, alkoxycarbonyl, arylcarbonyl, or aryloxycarbonyl, to provide compounds of formula (72). Compounds of formula (71), wherein X" is bromide, 5 chloride, or iodide, can be treated with a compound R'NHR" of formula (54), wherein R' and R" are as previously described for R' in compounds of formula (53), to provide a corresponding compound of formula (73). Scheme 12 Me 3 SnSnMe 3 or RO, ,OR S RO' (9)/OR S I CA Pd(0)/L. Nf.J ; N (37) R=alkyl, aryl M=Sn, B X'=BrCI, (38) Pd(O)/L. Pd(0)/L. M'-Ar 2 -NHRb X'-Ar 2 -NHRb (75) (76) M'=Sn, B, Zn, Mg, X'=Br, CI, I Rb=H, BocCbz, alkyl N Ar 2 -NHRb 10 (77) Compounds of formula (77), wherein X is S, R 3 is NHRb, and Arl, Ar 2 are defined as in compounds of formula (1) can be prepared as shown in Scheme 12. Compounds of formula (37) obtained as shown in Scheme 5 can be treated with a metal of the desired amino-substituted Ar2 group, as described for compounds of 15 formula (1), of formula (75) to provide compounds of formula (77). Compounds of formula (37) also can be treated with a hexamethylditin or diboron reagent of formula -30- (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, in the presence of a palladium catalyst to provide the corresponding tin or boronic acid of formula (38), which is reacted with a desired halide of an amine-substituted fused bicycloheterocycle represented by Ar 2 of formula (76), wherein X' is bromide, 5 chloride, or iodide, to provide compounds of formula (77). Scheme 13 NH Br 2 , KSCN NH2 HOAc N _ NH 2 N S Y'=O, NH, S (81) RX (80) 1X=CI,Br, I 0"""I OA\> NHRc N S (82) Rc=alkyl, aryl, RCO, Cbz, Boc bromination Br KSCN -NHRc (83) SCN b)R N5R6 S N cR or HNRR K7 IA- _~NHRc (85) \ (87) (87a) N S [Pd] [d (84) M=B, Zn, Sn RX

R

3 b N \>NHRC 00:( IIr O>~HR N )I NN~ N RN NH (8 8 ) (86) 10 Aminobenzothiazole-substituted quinuclidines of formula (82) can be obtained as shown in Scheme 13. Amino-substituted quinuclidine ethers, thioethers, and amines of formula (80) are obtained by methods described in Schemes 6-12. -31- Compounds of formula (80) are reacted with bromine and KSCN in acetic acid to provide aminobenzothiazole-substituted quinuclidines of formula (81). Compounds of formula (81) can be further treated with the halide of a desired RC group, wherein Rc as defined for R 5 or R 6 in compounds of formula (I) to provide the desired 5 aminobenzothiazole-substituted quinuclidine derivative (82). Compounds of formula (82) can be further treated to obtain compounds of formulas (84), (86), and (88). Bromination of compounds with formula (82) provides compounds of formula (83). Compounds of formula (83) are reacted with a nucleophilic agent, for example KSCN, to give compounds of formula (84). 10 Compounds of formula (83) can be treated with a metal of a suitable aryl group, as described for compounds of formula (1), of formula (85), in the presence of palladium catalyst to provide the corresponding compounds of formula (86). Compounds of formula (83) also can be treated with an alcohol of formula (87) or an amine of formula (87a), wherein R 4 , R 5 , and R 6 are as defined for compounds of formula (1), in 15 the presence of palladium catalyst to provide the corresponding compounds of formula (88). Scheme 14 -32- F~~< IA~-I HN0 3 -[~j r R-) A . NRa H 2

SO

4 'N, " NR Y'=O, NH, S (90) (89) 1) H 2 , Pd/C 2) (EtO) 3

CR

3 MeOH DMF

R

3 = alkyl, aryl N . (91) RP (92) H Benzoimidazole-substituted quinuclidines of formula (92), wherein Y' is 0, NH, or S and Ar is as defined for compounds of formula (1), can be obtained as 5 shown in Scheme 14. Compounds of formula (89), which are obtained by treating compounds of formula (80) in Scheme 13 under standard nitrogen-protection conditions, are reacted with nitric acid in sulfuric acid to provide compounds of formula (90). Compounds of formula (90) are hydrogenated by palladium catalysis and treated with excess triethylorthoformate to obtain compounds of formula (91). 10 Compounds of formula (91) are deprotected under standard nitrogen-deprotection conditions to obtain compounds of formula (92). Scheme 15 -33- RO~ ,0R X' , NO 2 , B-BOR RO\ NO 2 RO' (9) OR OBn Pd(0)/L.RO X'=Br,CI,I R=alkyl, aryl (96) (95) Y X' KNI (97) X'=Br, CI, I Pd(O)/L. Y'=O, NH, S Y, 0 N aOBn (98) 1) H 2 , Pd/C 2) (EtO) 3

CR

3 MeOH DMF IAr-R N R (99) Benzooxazole-substituted quinuclidines of formula (99), wherein Y' is 0, NH, or S and Ar and R 3 are as defined for compounds of formula (1), can be obtained as 5 shown in Scheme 14. Compounds of formula (95) can be treated with a diboron reagent of formula (9), such as bis(pinacolato)diboron and bis(catecholato)diboron, in the presence of a palladium catalyst to provide the corresponding tin or boronic acid of formula (96). Compounds of formula (96) are reacted with a desired halide of a quinuclidine-substituted heteroaromatic group Ar as represented by compounds of 10 formula (97), wherein X' is bromide, chloride, or iodide, to provide compounds of formula (98). Compounds of formula (98) are hydrogenated by palladium catalysis and treated with excess triethylorthoformate to obtain compounds of formula (99). Compounds of formula (1) wherein A is N can be converted to compounds of formula (1) wherein A is N*-0- by treatment with an oxidizing agent. Examples of the 15 oxidizing agent include, but not limited to, aqueous hydrogen peroxide and m -34chloroperbenzoic acid. The reaction is generally performed in a solvent such as, but not limited to, acetonitrile, water, dichloromethane, acetone or mixture thereof, preferably a mixture of acetonitrile and water, at a temperature from about room temperature to about 80 0 C, for a period of about 1 hour to about 4 days. 5 The compounds and intermediates of the invention may be isolated and purified by methods well-known to those skilled in the art of organic synthesis. Examples of conventional methods for isolating and purifying compounds can include, but are not limited to, chromatography on solid supports such as silica gel, alumina, or silica derivatized with alkylsilane groups, by recrystallization at high or 10 low temperature with an optional pretreatment with activated carbon, thin-layer chromatography, distillation at various pressures, sublimation under vacuum, and trituration, as described for instance in "Vogel's Textbook of Practical Organic Chemistry", 5th edition (1989), by Furniss, Hannaford, Smith, and Tatchell, pub. Longman Scientific & Technical, Essex CM20 2JE, England. 15 The compounds of the invention have at least one basic nitrogen whereby the compound can be treated with an acid to form a desired salt. For example, a compound may be reacted with an acid at or above room temperature to provide the desired salt, which is deposited, and collected by filtration after cooling. Examples of acids suitable for the reaction include, but are not limited to tartaric acid, lactic acid, 20 succinic acid, as well as mandelic, atrolactic, methanesulfonic, ethanesulfonic, toluenesulfonic, naphthalenesulfonic, carbonic, fumaric, gluconic, acetic, propionic, salicylic, hydrochloric, hydrobromic, phosphoric, sulfuric, citric, or hydroxybutyric acid, camphorsulfonic, malic, phenylacetic, aspartic, glutamic, and the like. 25 Compositions of the Invention The invention also provides pharmaceutical compositions comprising a therapeutically effective amount of a compound of formula (1) in combination with a pharmaceutically acceptable carrier. The compositions comprise compounds of the invention formulated together with one or more non-toxic pharmaceutically 30 acceptable carriers. The pharmaceutical compositions can be formulated for oral -35administration in solid or liquid form, for parenteral injection or for rectal administration. The term "pharmaceutically acceptable carrier," as used herein, means a non toxic, inert solid, semi-solid or liquid filler, diluent, encapsulating material or 5 formulation auxiliary of any type. Some examples of materials which can serve as pharmaceutically acceptable carriers are sugars such as lactose, glucose and sucrose; starches such as corn starch and potato starch; cellulose and its derivatives such as sodium carboxymethyl cellulose, ethyl cellulose and cellulose acetate; powdered tragacanth; malt; gelatin; talc; cocoa butter and suppository waxes; oils 10 such as peanut oil, cottonseed oil, safflower oil, sesame oil, olive oil, corn oil and soybean oil; glycols; such a propylene glycol; esters such as ethyl oleate and ethyl laurate; agar; buffering agents such as magnesium hydroxide and aluminum hydroxide; alginic acid; pyrogen-free water; isotonic saline; Ringer's solution; ethyl alcohol, and phosphate buffer solutions, as well as other non-toxic compatible 15 lubricants such as sodium lauryl sulfate and magnesium stearate, as well as coloring agents, releasing agents, coating agents, sweetening, flavoring and perfuming agents, preservatives and antioxidants can also be present in the composition, according to the judgment of one skilled in the art of formulations. The pharmaceutical compositions of this invention can be administered to 20 humans and other mammals orally, rectally, parenterally, intracisternally, intravaginally, intraperitoneally, topically (as by powders, ointments or drops), bucally or as an oral or nasal spray. The term "parenterally," as used herein, refers to modes of administration, including intravenous, intramuscular, intraperitoneal, intrasternal, subcutaneous, intraarticular injection and infusion. 25 Pharmaceutical compositions for parenteral injection comprise pharmaceutically acceptable sterile aqueous or nonaqueous solutions, dispersions, suspensions or emulsions and sterile powders for reconstitution into sterile injectable solutions or dispersions. Examples of suitable aqueous and nonaqueous carriers, diluents, solvents or vehicles include water, ethanol, polyols (propylene glycol, 30 polyethylene glycol, glycerol, and the like, and suitable mixtures thereof), vegetable oils (such as olive oil) and injectable organic esters such as ethyl oleate, or suitable -36mixtures thereof. Suitable fluidity of the composition may be maintained, for example, by the use of a coating such as lecithin, by the maintenance of the required particle size in the case of dispersions, and by the use of surfactants. These compositions can also contain adjuvants such as preservative agents, 5 wetting agents, emulsifying agents, and dispersing agents. Prevention of the action of microorganisms can be ensured by various antibacterial and antifungal agents, for example, parabens, chlorobutanol, phenol, sorbic acid, and the like. It also can be desirable to include isotonic agents, for example, sugars, sodium chloride and the like. Prolonged absorption of the injectable pharmaceutical form can be brought 10 about by the use of agents delaying absorption, for example, aluminum monostearate and gelatin. In some cases, in order to prolong the effect of a drug, it is often desirable to slow the absorption of the drug from subcutaneous or intramuscular injection. This can be accomplished by the use of a liquid suspension of crystalline or amorphous 15 material with poor water solubility. The rate of absorption of the drug can depend upon its rate of dissolution, which, in turn, may depend upon crystal size and crystalline form. Alternatively, a parenterally administered drug form can be administered by dissolving or suspending the drug in an oil vehicle. Suspensions, in addition to the active compounds, can contain suspending 20 agents, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar agar, tragacanth, and mixtures thereof. If desired, and for more effective distribution, the compounds of the invention can be incorporated into slow-release or targeted-delivery systems such as polymer 25 matrices, liposomes, and microspheres. They may be sterilized, for example, by filtration through a bacteria-retaining filter or by incorporation of sterilizing agents in the form of sterile solid compositions, which may be dissolved in sterile water or some other sterile injectable medium immediately before use. Injectable depot forms are made by forming microencapsulated matrices of 30 the drug in biodegradable polymers such as polylactide-polyglycolide. Depending upon the ratio of drug to polymer and the nature of the particular polymer employed, -37the rate of drug release can be controlled. Examples of other biodegradable polymers include poly(orthoesters) and poly(anhydrides) Depot injectable formulations also are prepared by entrapping the drug in liposomes or microemulsions which are compatible with body tissues. 5 The injectable formulations can be sterilized, for example, by filtration through a bacterial-retaining filter or by incorporating sterilizing agents in the form of sterile solid compositions which can be dissolved or dispersed in sterile water or other sterile injectable medium just prior to use. Injectable preparations, for example, sterile injectable aqueous or oleaginous 10 suspensions can be formulated according to the known art using suitable dispersing or wetting agents and suspending agents. The sterile injectable preparation also can be a sterile injectable solution, suspension or emulsion in a nontoxic, parenterally acceptable diluent or solvent such as a solution in 1,3-butanediol. Among the acceptable vehicles and solvents that can be employed are water, Ringer's solution, 15 U.S.P. and isotonic sodium chloride solution. In addition, sterile, fixed oils are conventionally employed as a solvent or suspending medium. For this purpose any bland fixed oil can be employed including synthetic mono- or diglycerides. In addition, fatty acids such as oleic acid are used in the preparation of injectables. Solid dosage forms for oral administration include capsules, tablets, pills, 20 powders, and granules. In such solid dosage forms, one or more compounds of the invention is mixed with at least one inert pharmaceutically acceptable carrier such as sodium citrate or dicalcium phosphate and/or a) fillers or extenders such as starches, lactose, sucrose, glucose, mannitol, and salicylic acid; b) binders such as carboxymethylcellulose, alginates, gelatin, polyvinylpyrrolidinone, sucrose, and 25 acacia; c) humectants such as glycerol; d) disintegrating agents such as agar-agar, calcium carbonate, potato or tapioca starch, alginic acid, certain silicates, and sodium carbonate; e) solution retarding agents such as paraffin; f) absorption accelerators such as quaternary ammonium compounds; g) wetting agents such as cetyl alcohol and glycerol monostearate; h) absorbents such as kaolin and bentonite 30 clay; and i) lubricants such as talc, calcium stearate, magnesium stearate, solid -38polyethylene glycols, sodium lauryl sulfate, and mixtures thereof. In the case of capsules, tablets and pills, the dosage form may also comprise buffering agents. Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using lactose or milk sugar as well as high molecular 5 weight polyethylene glycols. The solid dosage forms of tablets, dragees, capsules, pills, and granules can be prepared with coatings and shells such as enteric coatings and other coatings well-known in the pharmaceutical formulating art. They can optionally contain opacifying agents and can also be of a composition that they release the active 10 ingredient(s) only, or preferentially, in a certain part of the intestinal tract in a delayed manner. Examples of materials useful for delaying release of the active agent can include polymeric substances and waxes. Compositions for rectal or vaginal administration are preferably suppositories which can be prepared by mixing the compounds of this invention with suitable non 15 irritating carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at ambient temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound. Liquid dosage forms for oral administration include pharmaceutically acceptable emulsions, microemulsions, solutions, suspensions, syrups and elixirs. 20 In addition to the active compounds, the liquid dosage forms may contain inert diluents commonly used in the art such as, for example, water or other solvents, solubilizing agents and emulsifiers such as ethyl alcohol, isopropyl alcohol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3 butylene glycol, dimethylformamide, oils (in particular, cottonseed, groundnut, corn, 25 germ, olive, castor, and sesame oils), glycerol, tetrahydrofurfuryl alcohol, polyethylene glycols and fatty acid esters of sorbitan, and mixtures thereof. Besides inert diluents, the oral compositions can also include adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring, and perfuming agents. 30 Dosage forms for topical or transdermal administration of a compound of this invention include ointments, pastes, creams, lotions, gels, powders, solutions, -39sprays, inhalants or patches. A desired compound of the invention is admixed under sterile conditions with a pharmaceutically acceptable carrier and any needed preservatives or buffers as may be required. Ophthalmic formulation, eardrops, eye ointments, powders and solutions are also contemplated as being within the scope of 5 this invention. The ointments, pastes, creams and gels may contain, in addition to an active compound of this invention, animal and vegetable fats, oils, waxes, paraffins, starch, tragacanth, cellulose derivatives, polyethylene glycols, silicones, bentonites, silicic acid, talc and zinc oxide, or mixtures thereof. 10 Powders and sprays can contain, in addition to the compounds of this invention, lactose, talc, silicic acid, aluminum hydroxide, calcium silicates and polyamide powder, or mixtures of these substances. Sprays can additionally contain customary propellants such as chlorofluorohydrocarbons. Compounds of the invention also can be administered in the form of 15 liposomes. As is known in the art, liposomes are generally derived from phospholipids or other lipid substances. Liposomes are formed by mono- or multi lamellar hydrated liquid crystals that are dispersed in an aqueous medium. Any non toxic, physiologically acceptable and metabolizable lipid capable of forming liposomes may be used. The present compositions in liposome form may contain, in 20 addition to the compounds of the invention, stabilizers, preservatives, and the like. The preferred lipids are the natural and synthetic phospholipids and phosphatidylcholines (lecithins) used separately or together. Methods to form liposomes are known in the art. See, for example, Prescott, Ed., Methods in Cell Biology, Volume XIV, Academic Press, New York, N. Y., (1976), 25 p 33 et seq. Dosage forms for topical administration of a compound of this invention include powders, sprays, ointments and inhalants. The active compound is mixed under sterile conditions with a pharmaceutically acceptable carrier and any needed preservatives, buffers or propellants. Ophthalmic formulations, eye ointments, 30 powders and solutions are also contemplated as being within the scope of this invention. Aqueous liquid compositions of the invention also are particularly useful. -40- The compounds of the invention can be used in the form of pharmaceutically acceptable salts, esters, or amides derived from inorganic or organic acids. The term "pharmaceutically acceptable salts, esters and amides," as used herein, include salts, zwitterions, esters and amides of compounds of formula (1) which are, within 5 the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, are commensurate with a reasonable benefit/risk ratio, and are effective for their intended use. The term "pharmaceutically acceptable salt" refers to those salts which are, 10 within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, and are commensurate with a reasonable benefit/risk ratio. Pharmaceutically acceptable salts are well-known in the art. The salts can be prepared in situ during the final isolation and purification of the compounds of the 15 invention or separately by reacting a free base function with a suitable organic acid. Representative acid addition salts include, but are not limited to acetate, adipate, alginate, citrate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, camphorate, camphorsulfonate, digluconate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2 20 hydroxyethansulfonate (isethionate), lactate, maleate, methanesulfonate, nicotinate, 2-naphthalenesulfonate, oxalate, pamoate, pectinate, persulfate, 3 phenylpropionate, picrate, pivalate, propionate, succinate, tartrate, thiocyanate, phosphate, glutamate, bicarbonate, p-toluenesulfonate and undecanoate. Also, the basic nitrogen-containing groups can be quaternized with such 25 agents as lower alkyl halides such as methyl, ethyl, propyl, and butyl chlorides, bromides and iodides; dialkyl sulfates such as dimethyl, diethyl, dibutyl and diamyl sulfates; long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides; arylalkyl halides such as benzyl and phenethyl bromides and others. Water or oil-soluble or dispersible products are thereby obtained. 30 Examples of acids which can be employed to form pharmaceutically acceptable acid addition salts include such inorganic acids as hydrochloric acid, -41hydrobromic acid, sulphuric acid and phosphoric acid and such organic acids as oxalic acid, maleic acid, succinic acid, and citric acid. Basic addition salts can be prepared in situ during the final isolation and purification of compounds of this invention by reacting a carboxylic acid-containing 5 moiety with a suitable base such as the hydroxide, carbonate or bicarbonate of a pharmaceutically acceptable metal cation or with ammonia or an organic primary, secondary or tertiary amine. Pharmaceutically acceptable salts include, but are not limited to, cations based on alkali metals or alkaline earth metals such as lithium, sodium, potassium, calcium, magnesium, and aluminum salts, and the like, and 10 nontoxic quaternary ammonia and amine cations including ammonium, tetramethylammonium, tetraethylammonium, methylamine, dimethylamine, trimethylamine, triethylamine, diethylamine, ethylamine and the such as. Other representative organic amines useful for the formation of base addition salts include ethylenediamine, ethanolamine, diethanolamine, piperidine, and piperazine. 15 The term "pharmaceutically acceptable ester," as used herein, refers to esters of compounds of the invention which hydrolyze in vivo and include those that break down readily in the human body to leave the parent compound or a salt thereof. Examples of pharmaceutically acceptable, non-toxic esters of the invention include C1-to-C 6 alkyl esters and C 5 -to-C 7 cycloalkyl esters, although C 1 -to-C 4 alkyl esters 20 are preferred. Esters of the compounds of formula (1) can be prepared according to conventional methods. Pharmaceutically acceptable esters can be appended onto hydroxy groups by reaction of the compound that contains the hydroxy group with acid and an alkylcarboxylic acid such as acetic acid, or with acid and an arylcarboxylic acid such as benzoic acid. In the case of compounds containing 25 carboxylic acid groups, the pharmaceutically acceptable esters are prepared from compounds containing the carboxylic acid groups by reaction of the compound with base such as triethylamine and an alkyl halide, alkyl trifilate, for example with methyl iodide, benzyl iodide, cyclopentyl iodide. They also can be prepared by reaction of the compound with an acid such as hydrochloric acid and an alkylcarboxylic acid 30 such as acetic acid, or with acid and an arylcarboxylic acid such as benzoic acid. -42- The term "pharmaceutically acceptable amide," as used herein, refers to non toxic amides of the invention derived from ammonia, primary C 1 -to-C 6 alkyl amines and secondary C 1 -to-C 6 dialkyl amines. In the case of secondary amines, the amine can also be in the form of a 5- or 6-membered heterocycle containing one nitrogen 5 atom. Amides derived from ammonia, C 1 -to-C 3 alkyl primary amides and C 1 -to-C 2 dialkyl secondary amides are preferred. Amides of the compounds of formula (1) can be prepared according to conventional methods. Pharmaceutically acceptable amides can be prepared from compounds containing primary or secondary amine groups by reaction of the compound that contains the amino group with an alkyl 10 anhydride, aryl anhydride, acyl halide, or aroyl halide. In the case of compounds containing carboxylic acid groups, the pharmaceutically acceptable esters are prepared from compounds containing the carboxylic acid groups by reaction of the compound with base such as triethylamine, a dehydrating agent such as dicyclohexyl carbodiimide or carbonyl diimidazole, and an alkyl amine, dialkylamine, 15 for example with methylamine, diethylamine, piperidine. They also can be prepared by reaction of the compound with an acid such as sulfuric acid and an alkylcarboxylic acid such as acetic acid, or with acid and an arylcarboxylic acid such as benzoic acid under dehydrating conditions as with molecular sieves added. The composition can contain a compound of the invention in the form of a pharmaceutically acceptable 20 prodrug. The term "pharmaceutically acceptable prodrug" or "prodrug," as used herein, represents those prodrugs of the compounds of the invention which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and 25 the like, commensurate with a reasonable benefit/risk ratio, and effective for their intended use. Prodrugs of the invention can be rapidly transformed in vivo to a parent compound of formula (1), for example, by hydrolysis in blood. A thorough discussion is provided in T. Higuchi and V. Stella, Pro-drugs as Novel Delivery Systems, V. 14 of the A.C.S. Symposium Series, and in Edward B. Roche, ed., 30 Bioreversible Carriers in Drug Design, American Pharmaceutical Association and Pergamon Press (1987). -43- The invention contemplates pharmaceutically active compounds either chemically synthesized or formed by in vivo biotransformation to compounds of formula (1). 5 Methods of the Invention Compounds and compositions of the invention are useful for modulating the effects of nAChRs, and more particularly a7 nAChRs. In particular, the compounds and compositions of the invention can be used for treating and preventing disorders modulated by 7 nAChRs. Typically, such disorders can be ameliorated by 10 selectively modulating the a7 nAChRs in a mammal, preferably by administering a compound or composition of the invention, either alone or in combination with another active agent, for example, as part of a therapeutic regimen. The compounds of the invention, including but not limited to those specified in the examples, possess an affinity for nAChRs, and more particularly a7 nAChRs. As 15 a7 nAChRs ligands, the compounds of the invention can be useful for the treatment and prevention of a number of a7 nAChR-mediated diseases or conditions. For example, a7 nAChRs have been shown to play a significant role in enhancing cognitive function, including aspects of learning, memory and attention (Levin, E.D., J. Neurobiol. 53: 633-640, 2002). As such, a7 ligands are suitable for 20 the treatment of cognitive disorders including, for example, attention deficit disorder, attention deficit hyperactivity disorder (ADHD), Alzheimer's disease (AD), mild cognitive impairment, senile dementia, AIDS dementia, Pick's Disease, dementia associated with Lewy bodies, and dementia associated with Down's syndrome, as well as cognitive deficits associated with schizophrenia. 25 In addition, a7-containing nAChRs have been shown to be involved in the neuroprotective effects of nicotine both in vitro (Jonnala, R. B. and Buccafusco, J. J., J. Neurosci. Res. 66: 565-572, 2001) and in vivo (Shimohama, S. et al., Brain Res. 779: 359-363, 1998). More particularly, neurodegeneration underlies several progressive CNS disorders, including, but not limited to, Alzheimer's disease, 30 Parkinson's disease, amyotrophic lateral sclerosis, Huntington's disease, dementia with Lewy bodies, as well as diminished CNS function resulting from traumatic brain -44injury. For example, the impaired function of a7 nAChRs by p-amyloid peptides linked to Alzheimer's disease has been implicated as a key factor in development of the cognitive deficits associated with the disease (Liu, Q.-S., Kawai, H., Berg, D. K., PNAS 98: 4734-4739, 2001). The activation of a7 nAChRs has been shown to block 5 this neurotoxicity (Kihara, T. et al., J. Biol. Chem. 276: 13541-13546, 2001). As such, selective ligands that enhance a7 activity can counter the deficits of Alzheimer's and other neurodegenerative diseases. Schizophrenia is a complex disease that is characterized by abnormalities in perception, cognition, and emotions. Significant evidence implicates the involvement 10 of a7 nAChRs in this disease, including a measured deficit of these receptors in post-mortem patients (Leonard, S. Eur. J. Pharmacol. 393: 237-242, 2000). Deficits in sensory processing (gating) are one of the hallmarks of schizophrenia. These deficits can be normalized by nicotinic ligands that operate at the a7 nAChR (Adler L. E. et al., Schizophrenia Bull. 24: 189-202, 1998; Stevens, K. E. et al., 15 Psychopharmacology 136: 320-327, 1998). Thus, a7 ligands demonstrate potential in the treatment schizophrenia. Angiogenesis, a process involved in the growth of new blood vessels, is important in beneficial systemic functions, such as wound healing, vascularization of skin grafts, and enhancement of circulation, for example, increased circulation 20 around a vascular occlusion. Non-selective nAChR agonists like nicotine have been shown to stimulate angiogenesis (Heeschen, C. et al., Nature Medicine 7: 833-839, 2001). Improved angiogenesis has been shown to involve activation of the a7 nAChR (Heeschen, C. et al, J. Clin. Invest. 110: 527-536, 2002). Therefore, nAChR ligands that are selective for the a7 subtype offer improved potential for stimulating 25 angiogenesis with an improved side effect profile. A population of a7 nAChRs in the spinal cord modulate serotonergic transmission that have been associated with the pain-relieving effects of nicotinic compounds (Cordero-Erausquin, M. and Changeux, J.-P. PNAS 98:2803-2807, 2001). The a7 nAChR ligands demonstrate therapeutic potential for the treatment of 30 pain states, including acute pain, post-surgical pain, as well as chronic pain states -45including inflammatory pain and neuropathic pain. Moreover, a7 nAChRs are expressed on the surface of primary macrophages that are involved in the inflammation response, and that activation of the a7 receptor inhibits release of TNF and other cytokines that trigger the inflammation response (Wang, H. et al Nature 5 421: 384-388, 2003). Therefore, selective a7 ligands demonstrate potential for treating conditions involving inflammation and pain. The mammalian sperm acrosome reaction is an exocytosis process important in fertilization of the ovum by sperm. Activation of an a7 nAChR on the sperm cell has been shown to be essential for the acrosome reaction (Son, J.-H. and Meizel, S. 10 Biol. Reproduct. 68: 1348-1353 2003). Consequently, selective 7 agents demonstrate utility for treating fertility disorders. Compounds of the invention are particularly useful for treating and preventing a condition or disorder affecting cognition, neurodegeneration, and schizophrenia. Cognitive impairment associated with schizophrenia often limits the ability of 15 patients to function normally, a symptom not adequately treated by commonly available treatments, for example, treatment with an atypical antipsychotic. (Rowley, M. et al., J. Med. Chem. 44: 477-501, 2001). Such cognitive deficit has been linked to dysfunction of the nicotinic cholinergic system, in particular with decreased activity at a7 receptors. (Friedman, J. 1. et al., Biol Psychiatry, 51: 349-357, 2002). Thus, 20 activators of a7 receptors can provide useful treatment for enhancing cognitive function in schizophrenic patients who are being treated with atypical antipsychotics. Accordingly, the combination of an 07 nAChR ligand and an atypical antipsychotic would offer improved therapeutic utility. Specific examples of suitable atypical antipsychotics include, but are not limited to, clozapine, risperidone, olanzapine, 25 quietapine, ziprasidone, zotepine, iloperidone, and the like. Actual dosage levels of active ingredients in the pharmaceutical compositions of this invention can be varied so as to obtain an amount of the active compound(s) that is effective to achieve the desired therapeutic response for a particular patient, compositions and mode of administration. The selected dosage level will depend 30 upon the activity of the particular compound, the route of administration, the severity of the condition being treated and the condition and prior medical history of the -46patient being treated. However, it is within the skill of the art to start doses of the compound at levels lower than required to achieve the desired therapeutic effect and to gradually increase the dosage until the desired effect is achieved. When used in the above or other treatments, a therapeutically effective 5 amount of one of the compounds of the invention can be employed in pure form or, where such forms exist, in pharmaceutically acceptable salt, ester, amide or prodrug form. Alternatively, the compound can be administered as a pharmaceutical composition containing the compound of interest in combination with one or more pharmaceutically acceptable carriers. The phrase "therapeutically effective amount" 10 of the compound of the invention means a sufficient amount of the compound to treat disorders, at a reasonable benefit/risk ratio applicable to any medical treatment. It will be understood, however, that the total daily usage of the compounds and compositions of the invention will be decided by the attending physician within the scope of sound medical judgment. The specific therapeutically effective dose level 15 for any particular patient will depend upon a variety of factors including the disorder being treated and the severity of the disorder; activity of the specific compound employed; the specific composition employed; the age, body weight, general health, sex and diet of the patient; the time of administration, route of administration, and rate of excretion of the specific compound employed; the duration of the treatment; 20 drugs used in combination or coincidental with the specific compound employed; and like factors well-known in the medical arts. For example, it is well within the skill of the art to start doses of the compound at levels lower than required to achieve the desired therapeutic effect and to gradually increase the dosage until the desired effect is achieved. 25 The total daily dose of the compounds of this invention administered to a human or lower animal range from about 0.10 mg/kg body weight to about 1 g/kg body weight. More preferable doses can be in the range of from about 0.10 mg/kg body weight to about 100 mg/kg body weight. If desired, the effective daily dose can be divided into multiple doses for purposes of administration. Consequently, single 30 dose compositions may contain such amounts or submultiples thereof to make up the daily dose. -47- The compounds and processes of the invention will be better understood by reference to the following examples and reference examples, which are intended as an illustration of and not a limitation upon the scope of the invention. 5 EXAMPLES Example 1 3-[4-( 1-Azabicyclo[2.2.2loct-3-vloxv)phenyll-1 H-indole 10 Example 1A 3-(4-lodophenoxv)quinuclidine Under N 2 , the mixture of 3-hydroxy quinuclidine (Aldrich, 2.54 g, 20 mmol), 1,4-diiodobenzene (Aldrich, 7.9 g, 24 mmol), Cul (Strem Chemicals, 0.38 g, 2 mmol) and 1,10-phenanthroline (Aldrich, 0.72 g, 4 mmol) in toluene (anhydrous, Aldrich, 50 15 mL) was stirred at 110 *C for 40 h. After the reaction went to completion, the reaction mixture was diluted with chloroform (100 mL) and washed with water (2 x 10 mL). The organic solution was concentrated and the title compound was purified by chromatography (SiO 2 , CH 2 Cl2: MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.20) as oil (3.7 g, yield, 56%). 1 H NMR (300 MHz, CD 3 0D) 8 1.40-1.56 (m, 1H), 1.64-1.80 (m, 2H), 20 1.90-2.08 (m, 1H), 2.10-2.21 (m, 1H), 2.60-3.00 (m, 5H), 3.34-3.40 (m, 1H), 4.46 (m, 1H), 6.73 (d, J=8.8 Hz, 2H), 7.56 (d, J=8.8, Hz, 2H), ppm. MS (DCI/NH 3 ) m/z 330 (M+H)*. Example 1 B 25 3-[4-(1-Azabicyclo[2.2.2loct-3-yloxy)phenyll-1 H-indole The mixture of the product of Example 1A (330 mg, 1 mmol), N-(2-ethynyl phenyl)-2,2,2-trifluoro-acetamide (ref. Tetrahedron Lett. 1992, 33, 3915.; 280 mg, 1.3 mmol), Pd 2 (dba) 3 (Aldrich, 19 mg, 0.02 mmol) and K 2

CO

3 (180 mg, 1.3 mmol) in DMSO (3 mL) was stirred at 40 *C under N 2 for 2 hours. The reaction was monitored 30 with TLC. After the reaction was complete, it was cooled down to room temperature and diluted with EtOAc (50 mL). It was then washed with brine (3 x 5 mL). The -48organic solution was concentrated and the title product was purified by preparative HPLC (Gilson, column, Symmetry® C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (113 mg, yield, 36%). 'H NMR (300 MHz, CD 3 0D) 6 1.43-1.57 (m, 5 1H), 1.62-1.89 (m, 2H), 2.01-2.15 (m, 1H), 2.16-2.23 (m, 1H), 2.73-3.03 (m, 5H), 3.28-3.40 (m, 1H), 4.51-4.58 (m, 1H), 6.97 (dt, J=8.8, 2.1 Hz, 2H), 7.03-7.17 (m, 2H), 7.36 (s, 1H), 7.37-7.42 (m, 1H), 7.57 (dt, J=8.8, 2.0 Hz, 2H), 7.81 (dt, J= 7.8, 1.2 Hz, 1H) ppm. MS (DCI/NH 3 ) m/z 319 (M+H)*. 10 Example 1C 3-[4-( -Azabicyclo[2.2.2loct-3-yloxy)phenyll-1 H-indole hemifumarate The product of Example 1 B (113 mg, 0.36 mmol) was treated with fumaric acid (46 mg, 0.4 mmol) in EtOAc/EtOH (v. 1:1, 4 mL) at ambient temperature for 10 h. The title compound was obtained as solid (131 mg, yield, 89%). 'H NMR (300 15 MHz, CD 3 0D) 6 1.73-2.13 (m, 3H), 2.23-2.37 (m, 1H), 2.43-2.51 (m, 1H), 3.12-3.43 (m, 5H), 3.64-3.76 (m, 1H), 4.77-4.88 (m, 1H), 6.67 (s, 1.4H), 6.99-7.18 (m, 4H), 7.38 (s, 1H), 7.39-7.43 (m, 1H), 7.61 (dt, J=8.8, 2.0 Hz, 2H), 7.80 (d, J= 7.8 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 319 (M+H)*. Anal. Calculated for C 21

H

22

N

2 0-0.85 C 4

H

4 0 4 : C, 70.27; H, 6.14; N, 6.72. Found: C, 70.20; H, 6.35; N, 6.88. 20 Example 2 444-( 1-Azabicyclo[2.2.21oct-3-yloxy)phenyll-1 H-indole Example 2A 25 3-[4-(Trimethylstannvl)phenoxyiquinuclidine The mixture of the product from Example 1A (330 mg, 1mmol), hexamethylditin (Aldrich, 654 mg, 2 mmol) and Pd(PPh 3

)

4 (Aldrich, 116 mg, 0.1 mmol) in toluene (10 mL) was stirred at 110 *C under N 2 for 2 hours. The reaction was monitored with TLC. After the reaction was complete, it was cooled down to 30 room temperature and diluted with EtOAc (50 mL). It was then washed with brine (2 x 5 mL). The organic solution was concentrated under reduced pressure and the title -49compound was purified by flash chromatography (SiO 2 , CH 2 Cl 2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.35) as solid (300 mg, yield, 82%). 1 H NMR (300 MHz, CD 3 0D) 6 0.25 (s, 9H), 1.79-2.16 (m, 3H), 2.23-2.36 (m, 1H), 2.45-2.52 (m, 1H), 3.17-3.43 (m, 5H), 3.73-3.83 (m, 1H), 4.84-4.92 (m, 1H), 6.96 (d, J=8.5 Hz, 2H), 7.41 (d, J=8.5 Hz, 2H) 5 ppm. MS (DCI/NH 3 ): m/z 364 (M+H)*, 366 (M+H)*, 368 (M+H)*. Example 2B 444-( (-Azabicyclo[2.2.2loct-3-vloxy)phenyll-1 H-indole The product of 2A (300 mg, 0.8 mmol), 4-bromoindole (Aldrich, 196 mg, 1 10 mmol), Pd 2 (dba) 3 (Aldrich, 27 mg, 0.03 mmol) and (o-tol.) 3 P (Aldrich, 27 mg, 0.09 mmol) in DMF (Aldrich, anhydrous, 5 mL) were heated to 80 *C under N 2 and stirred overnight. It was then cooled down to room temperature and diluted with EtOAc (50 mL). The mixture was washed with brine (2 x 5 mL). The organic solution was concentrated under reduced pressure and the title compound was purified by flash 15 chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

H

2 0, 90:10:1, Rf. 0.30) as a solid (48 mg, yield, 19%). 1 H NMR (300 MHz, CD 3 0D) 6 1.46-1.58 (m, 1H), 1.64-1.91 (m, 2H), 2.01-2.17 (m, 1H), 2.19-2.26 (m, 1H), 2.75-3.03 (m, 5H), 3.32-3.42 (m, 1H), 4.55-4.63 (m, 1H), 6.58 (dd, J=3.4, 1.0 Hz, 1H), 6.98-7.04 (m, 3H), 7.14 (t, J=7.8 Hz, 1H), 7.25 (d, J=3.1 Hz, 1H), 7.33 (dt, J=8.1, 1.0 Hz, 1H), 7.59 (dt, J=9.2, 2.7 Hz, 2H) 20 ppm. MS (DCI/NH 3 ): m/z 319 (M+H)*. Example 2C 4-[4-( 1-Azabicyclo[2.2.2]oct-3-vloxv)phenyll-1 H-indole fuinarate The product of Example 2B (48 mg, 0.15 mmol) was treated with fumaric acid 25 (23 mg, 0.2 mmol) in EtOAc/EtOH (v. 1:1, 3 mL) at ambient temperature for 15 h. The title compound was obtained as solid (60.2 mg, yield, 90%). 1 H NMR (300 MHz,

CD

3 0D) 6 1.82-2.19 (m, 3H), 2.29-2.42 (m, 1H), 2.51-2.58 (m, 1H), 3.16-3.46 (m, 5H), 3.75-3.85 (m, 1H), 4.89-4.96 (m, 1H), 6.56 (dd, J=3.4, 1.0 Hz, 1H), 6.69 (s, 2.2H), 7.02 (dd, J=7.1, 1.0 Hz, 1H), 7.08 (dt, J=8.8, 2.5 Hz, 2H), 7.15 (t, J=7.5 Hz, 30 1H), 7.26 (d, J=3.4 Hz, 1H), 7.35 (dt, J=8.1, 1.0 Hz, 1H), 7.64 (dt, J=8.8, 2.6 Hz, 2H) -50ppm. MS (DCI/NH 3 ): m/z 319 (M+H)*. Anal. Calculated for C 21

H

22

N

2 0-1.12 C 4

H

4 0 4 : C, 68.25; H, 5.95; N, 6.25. Found: C, 68.43; H, 5.58; N, 6.20. Example 3 5 5-[4-(1-Azabicvclo[2.2.2loct-3-yloxy)phenvil-1 H-indole Example 3A 5-[4-( -Azabicyclo[2.2.2loct-3-vloxy)phenyll-1 H-indole Under N 2 , the product of Example 1A (329 mg, 1 mmol), 5-indolylboronic acid 10 (Frontier, 193 mg, 1.2 mmol), Pd 2 (dba) 3 (Aldrich, 24 mg, 0.025 mmol), (tBu 3

P)

2 Pd (26 mg, 0.05mmol), K 2

CO

3 (276 mg, 2 mmol) and KF (80 mg, 1.4 mmol) in THF(8 mL) was stirred at 60 0 C overnight. The reaction was monitored with TLC. After the reaction was complete, it was diluted with EtOAc (30 mL) and washed with brine (2 x 5 mL). The organic solution was concentrated under reduced pressure and the title 15 product was purified by preparative HPLC (Gilson, column, Symmetry® C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (80 mg, yield, 25%). 1 H NMR (300 MHz, CD 3 0D) 6 1.44-1.58 (m, 1H), 1.62-1.90 (m, 2H), 2.01-2.15 (m, 1H), 2.16-2.24 (m, 1H), 2.74-3.04 (m, 5H), 3.27-3.40 (m, 1H), 4.51-4.59 (m, 1H), 6.46 (dd, 20 J=3.4, 1.1 Hz, 1H), 6.95 (dt, J=8.8, 2.6 Hz, 2H), 7.22 (d, J=3.1 Hz, 1H), 7.31 (dd, J=8.5, 2.0 Hz, 1H), 7.40 (dt, J=8.5, 1.0 Hz, 1H), 7.54 (dt, J=9.2, 2.6 Hz, 2H), 7.71 (dd, J=1.7, 0.7 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 319 (M+H)*. Example 3B 25 5-[4-(1 -Azabicyclo[2.2.2loct-3-vloxv)phenyll- 1 H-indole fumarate The product of Example 3A (80 mg, 0.25 mmol) was treated with fumaric acid (29 mg, 0.25 mmol) in EtOAc/EtOH (v. 1:1, 4 mL) at ambient temperature for 10 h. The title compound was obtained as solid (57 mg, yield, 52%). 'H NMR (300 MHz,

CD

3 0D) 6 1.78-2.16 (m, 3H), 2.25-2.39 (m, 1H), 2.46-2.54 (m, 1H), 3.14-3.45 (m, 30 5H), 3.69-3.81 (m, 1H), 4.80-4.89 (m, 1H), 6.46 (dd, J=3.0, 1.0, 1H), 6.68 (s, 2H), 7.02 (dt, J=8.8, 2.5 Hz, 2H), 7.23 (d, J=3.1 Hz, 1H), 7.31 (dd, J=8.5, 2.0 Hz, 1H), -51- 7.43 (dt, J=8.4, 0.8 Hz, 1H), 7.58 (dt, J=9.2, 2.6 Hz, 2H), 7.71 (dd, J=1.7, 1.0 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 319 (M+H)*. Anal. Calculated for C 21

H

22

N

2 0-C 4

H

4 0 4 : C, 69.11; H, 6.03; N, 6.45. Found: C, 69.23; H, 5.81; N, 6.59. 5 Example 4 5-{4-[(3R)-1 -Azabicyclo[2.2.2loct-3-vloxylphenvll-1 H-indole Example 4A (3R)-3-Quinuclidinol 10 (3R)-3-Quinuclidinol hydrochloride (Aldrich, 20 g, 12.2 mmol) was treated with NaOH aqueous solution(20%, 50 mL) at ambient temperature for 10 min. It was then extracted with CHCI3/'PrOH (v. 10 : 1, 3 x 200 mL). The extracts were combine, washed with brine (50 mL) and dried over MgSO 4 . The drying agents were removed by filtration and the filtrates was concentrated under reduced pressure to give the 15 title compound as white solid (15. 5 g, yield, 99%). 1 H NMR (300 MHz, CD 3 0D) 6 1.36-1.50 (m, 1H), 1.52-1.60 (m, 1H), 1.76-1.85 (m, 2H), 1.90-2.05 (m, 1H), 2.50 2.95(m, 5H), 3.10 (ddd, J=14.2, 8.4, 2.3 Hz, 1H), 3.82-3.88 (m, IH) ppm. MS (DCI/NH3): m/z 128 (M+H)*. 20 Example 4B (3R)-3-(4-Bromophenoxv)quinuclidine The product of Example 4A (1.27 g, 10 mmol) was coupled with 1-iodo-4 bromobenzene (Aldrich, 2.83 g, 10 mol) according to the procedure of Example 1A. The title product was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 25 90:10:1, Rf. 0.30) as solid (400 mg, yield, 14%). 1 H NMR (300 MHz, CD 3 0D) 6 1.41 1.54 (m, 1H), 1.59-1.73 (m, 1H), 1.73-1.86 (m, 1H), 1.92-2.06 (m, 1H), 2.09-2.17 (m, 1H), 2.71-2.97 (m, 5H), 3.24-3.34 (m, 1H), 4.45-4.52 (m, 1H), 6.83 (dt, J=9.2, 2.6 Hz, 2H), 7.37 (dt, J=9.2, 2.7 Hz, 2H) ppm. MS (DCI/NH 3 ): m/z 282 (M+H)*, 284 (M+H)*. 30 Example 4C 5-{4-[(3R)-1-Azabicyclo[2.2.2loct-3-vloxylphenyll-1 H-indole -52- The product of 4C (282 mg, 1 mmol) coupled with 5-indolylboronic acid (Frontier, 190 mg, 1.2 mmol) according to the procedure of Example 3A. The title product was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.35) as solid (50 mg, yield, 16%). 'H NMR (300 MHz, CD 3 0D) 6 1.44-1.58 (m, 5 1H), 1.62-1.90 (m, 2H), 2.01-2.15 (m, 1H), 2.16-2.24 (m, 1H), 2.74-3.04 (m, 5H), 3.27-3.40 (m, 1H), 4.51-4.59 (m, 1H), 6.46 (dd, J=3.4, 1.1 Hz, 1H), 6.95 (dt, J=8.8, 2.6 Hz, 2H), 7.22 (d, J=3.1 Hz, 1H), 7.31 (dd, J=8.5, 2.0 Hz, 1H), 7.40 (dt, J=8.5, 1.0 Hz, 1H), 7.54 (dt, J=9.2, 2.6 Hz, 2H), 7.71 (dd, J=1.7, 0.7 Hz, 1H) ppm. MS

(DCI/NH

3 ): m/z 319 (M+H)*. 10 Example 4D 5-{4-[(3R)-1 -Azabicyclo[2.2.2loct-3-yloxylphenyll-1 H-indole fumarate The product of Example 4C (50 mg, 0.25 mmol) was treated with fumaric acid (29 mg, 0.25 mmol) in EtOAc/EtOH (v. 1:1, 4 mL) at ambient temperature for 10 h. 15 The title compound was obtained as solid (56.9 mg, yield, 52%). 1 H NMR (300 MHz,

CD

3 0D) 6 1.78-2.16 (m, 3H), 2.25-2.39 (m, 1H), 2.46-2.54 (m, 1H), 3.14-3.45 (m, 5H), 3.69-3.81 (m, 1H), 4.80-4.89 (m, 1H), 6.46 (dd, J=3.0, 1.0, 1H), 6.68 (s, 2.2H), 7.02 (dt, J=8.8, 2.5 Hz, 2H), 7.23 (d, J=3.1 Hz, 1H), 7.31 (dd, J=8.5, 2.0 Hz, 1H), 7.43 (dt, J=8.4, 0.8 Hz, 1H), 7.58 (dt, J=9.2, 2.6 Hz, 2H), 7.71 (dd, J=1.7, 1.0 Hz, 1H) 20 ppm. MS (DCI/NH 3 ): m/z 319 (M+H)*. Anal. Calculated for C 21

H

22

N

2 0-1.14 C 4

H

4 0 4 : C, 68.11; H, 5.94; N, 6.21. Found: C, 68.12; H, 6.04; N, 6.18. Example 5 6-[4-( 1-Azabicyclof2.2.2]oct-3-vloxv)phenyll-1 H-indole 25 Example 5A 6-[4-(1-Azabicyclo[2.2.2loct-3-vloxv)phenyl-1 H-indole The product of Example 2A (300 mg, 0.8 mmol) was coupled with 6 bromoindole (Aldrich, 196 mg, 1 mmol) according to the procedure in 2B. The title 30 compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

H

2 0, 90:10:1, Rf. 0.20) as a solid (30 mg, yield, 12%). 1 H NMR (300 MHz, CD 3 0D) 6 -53- 1.45-1.58 (m, 1H), 1.64-1.90 (m, 2H), 2.01-2.15 (m, 1H), 2.17-2.24 (m, 1H), 2.75 3.04 (m, 5H), 3.30-3.42 (m, 1H), 4.53-4.61 (m, 1H), 6.43 (dd, J=3.1, 0.7 Hz, 1H), 6.97 (dt, J=8.8, 2.6 Hz, 2H), 7.21-7.27 (m, 2H), 7.52-7.60 (m, 4H) ppm. MS

(DCI/NH

3 ): m/z 319 (M+H)*. 5 Example 5B 6-[4-( -Azabicyclo[2.2.2loct-3-vloxv)phenyll-1 H-indole fumarate The product of Example 5A (30 mg, 0.1 mmol) was treated with fumaric acid (12 mg, 0.1 mmol) in EtOAc/EtOH (v. 1:1, 2 mL) at ambient temperature for 15 h. 10 The title compound was obtained as solid (38.4 mg, yield, 79%). 'H NMR (300 MHz,

CD

3 0D) 6 1.80-2.19 (m, 3H), 2.27-2.40 (m, 1H), 2.48-2.56 (m, 1H), 3.17-3.63 (m, 5H), 3.72-3.83 (m, 1H), 4.80-4.88 (m, 1H), 6.43 (dd, J=3.1, 0.7 Hz, 1H), 6.68 (s, 2H), 7.04 (dt, J=8.8, 2.5 Hz, 2H), 7.21-7.27 (m, 2H), 7.53-7.65 (m, 4H) ppm.

MS(DCI/NH

3 ): m/z 319 (M+H)*. Anal. Calcd. for C 1

H

20

N

4 0-1.3 C 4

H

4 0 4 : C, 67.05; H, 15 5.84; N, 5.97. Found: C, 67.15; H, 5.99; N, 5.95. Example 6 2-[4-(1-Azabicyclo[2.2.2loct-3-vloxv)phenvll-1 H-indole 20 Example 6A 3-(4-Ethynylphenoxy)quinuclidine Under N 2 , the mixture of the product from Example 1A (800 mg, 2.4 mmol), trimethylsilylacetylene (Aldrich, 392 mg, 4 mmol), Pd(PPh 3

)

4 (Aldrich, 29 mg, 0.025 mmol) and Cui (Strem Chemicals, 10 mg, 0.05 mmol) in DMF (10 mL) was stirred at 25 ambient temperature overnight. DMF then was removed under reduced pressure. The residue was treated with tetrabutyl ammonium fluoride (Aldrich, in THF, 1 M, 5 mL) at room temperature for 3 h. The reaction was monitored with TLC. After the reaction was complete, it was diluted with EtOAc (50 mL) and washed with brine (2 x 10 mL). The organic solution was concentrated and the title compound was purified 30 by chromatography (SiO 2 , CH 2 Cl 2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.30) as a solid (560 mg, yield, 99%). 1 H NMR (300 MHz, CD 3 0D) 6 1.42-1.54 (m, 1H), 1.61-1.87 -54- (m, 2H), 1.93-2.07 (m, 1H), 2.10-2.18 (m, 1H), 2.71-3.00 (m, 5H), 3.19-3.37 (m, 2H), 4.49-4.56 (m, 1H), 6.86 (d, J=8.8 Hz, 2H), 7.37 (d, J=8.8 Hz, 2H) ppm. MS

(DCI/NH

3 ): m/z 228 (M+H)*. 5 Example 6B 2,2,2-Trifluoro-N-(2-iodophenyl)acetamide 2-lodo-phenylamine (Aldrich, 1.09 g, 5 mmol) was treated with trifluoroacetic anhydride (Aldrich, 1.26 g, 6 mmol) and 2,6-di-tert-butyl-4-methyl-pyridine (Aldrich, 1.23 g, 6 mmol) in CH 2

CI

2 (10 mL)at room temperature overnight. It was then 10 quenched with with water (5 mL) and extracted with EtOAc (3 x 10 mL). The extracts were combined and washed with brine (5 mL). The organic solution was concentrated and the title compound was purified by flash chromatography (SiO 2 , Hexanes/EtOAc, 80:20, Rf. 0.50) as a solid (1.1 g, yield, 70%). 'H NMR (300 MHz,

CD

3 0D) 6 7.07-7.12 (m, 1H), 7.39-7.47 (m, 2H), 7.95 (dd, J=7.8, 1.3 Hz, 1H) ppm. 15 MS (DCI): m/z 316 (M+H)*. Example 6C 2-[4-( -Azabicyclo[2.2.2loct-3-yloxy)phenyll-1 H-indole Under N 2 , the mixture of product from Example 6A (114 mg, 0.5 mmol), the 20 product from Example 6B (157 mg, 0.5 mmol), Cul (Strem Chemicals, 14 mg, 0.075 mmol), PPh 3 (Aldrich, 39 mg, 0.15 mmol) and K 3

PO

4 (212 mg, 1 mmol) in dioxane (5 mL) was stirred at 80 *C for 20 h. After the reaction was complete, it was diluted with EtOAc (30 mL) and washed with brine (2 x 5 mL). The organic solution was concentrated under reduced pressure and the title compound was purified by 25 chromatography (SiO 2 , CH 2 Cl 2 : MeOH: NH 3

H

2 0, 90:10:1, Rf. 0.30) as solid (70 mg, yield, 44%). 'H NMR (300 MHz, CD 3 0D) 6 1.45-1.59 (m, 1H), 1.65-1.91 (m, 2H), 2.00-2.14 (m, 1H), 2.17-2.24 (m, 1H), 2.75-3.01 (m, 5H), 3.31-3.42 (m, 1H), 4.54 4.62 (m, 1H), 6.66 (d, J=0.7 Hz, 1H), 6.93-7.00 (m, 3H), 7.01-7.08 (m, 1H), 7.35 (dq, J=8.2, 1.0 Hz, 1H), 7.48 (dq, J=7.8, 0.7 Hz, 1H), 7.71 (dt, J=8.8, 2.6 Hz, 2H) ppm. 30 MS (DCI/NH 3 ): m/z 319 (M+H)*. -55- Example 6D 2-[4-(1-Azabicyclo[2.2.2loct-3-vloxy)phenyll-1 H-indole fumarate The product of Example 6C (70 mg, 0.22 mmol) was treated with fumaric acid (29 mg, 0.25 mmol) in EtOAc/EtOH (v. 1:1, 3 mL) at ambient temperature for 10 h. 5 The title compound was obtained as solid (87 mg, yield, 89%). 1 H NMR (300 MHz,

CD

3 0D) 6 1.81-2.18(m, 3H), 2.25-2.39 (m, 1H), 2.48-2.56 (m, 1H), 3.19-3.48 (m, 5H), 3.73-3.85 (m, 1H), 4.86-4.93 (m, 1H), 6.65-6.80 (m, 2H), 6.94-7.10 (m, 4H), 7.36 (dd, J=8.1, 0.7 Hz, 1H), 7.49 (dt, J=7.8, 1.0 Hz, 1H), 7.75 (dt, J=9.2, 2.4 Hz, 2H) ppm. MS (DCI/NH 3 ): m/z 319 (M+H)*. Anal. Calculated for C 21

H

22

N

2 0-1.1 C 4

H

4 0 4 : 10 C, 68.39; H, 5.96; N, 6.28. Found: C, 68.10; H, 6.22; N, 6.25. Example 7 5-[6-( 1-Azabicyclo[2.2.2]oct-3-vloxv)pyridazin-3-yll-1 H-indole 15 Example 7A 3-[(6-Chloropyridazin-3-vl)oxvlauinuclidine 3-Quinuclidinol (Aldrich, 508 mg, 4 mmol) was treated with tBuOK (Aldrich, 448 mg, 4 mmol) in THF(20 mL) at ambient temperature for 1 hour. 3,6 Dichloropyradazine (Aldrich, 740 mg, 5 mmol) was then added. The mixture was 20 stirred at ambient temperature for additional 1 h. The reaction was monitored with TLC. After the reaction was complete, it was concentrated under reduced pressure. The residue was dissolved in CHCl3/'PrOH (v.10 : 1, 50 mL) and washed with brine (2 x 5 mL). The organic solution was concentrated under reduced pressure and the title compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 25 90:10:1, Rf. 0.45) as a solid (780 mg, yield, 82%). 1 H NMR (300 MHz, CD 3 0D) 6 1.48-1.61 (m, 1H), 1.65-1.90 (m, 2H), 1.94-2.08 (m, 1H), 2.23-2.31 (m, 1H), 2.73 3.01 (m, 5H), 3.37-3.48 (m, 1H), 5.18-5.27 (m, 1H), 7.23 (d, J=9.2 Hz, 1H), 7.65 (d, J=9.2 Hz, 1H) ppm. MS (DCI/NH 3 ): 240 (M+H)*, 242 (M+H)*. 30 Example 7B 5-[6-( 1-Azabicyclo[2.2.2loct-3-yloxy)pvridazin-3-vll-1 H-indole -56- The product of Example 7A (200 mg, 0.8 mmol) was coupled with 5 indolylboronic acid (161 mg, 1 mmol) according to the procedure of Example 3A. The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 5 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (35 mg, yield, 14%). 'H NMR (300 MHz, CD 3 0D) 6 1.50-1.65 (m, 1H), 1.70-1.93 (m, 2H), 2.00-2.16 (m, 1H), 2.29-2.37 (m, 1H), 2.78-3.05 (m, 5H), 3.44-3.55 (m, 1H), 5.26-5.35 (m, 1H), 6.56(dd, J=3.3, 1.1 Hz, 1H)), 7.25 (d, J=9.2 Hz, 1H), 7.31 (d, J=3.4 Hz, 1H), 7.51 (d, J=8.8 Hz, 1H), 7.73 (dd, J=8.5, 1.7 Hz, 1H), 8.08 (d, J=9.5 Hz, 1H), 8.14 (d, J=1.7 10 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Example 7C 5-[6-( -Azabicyclo[2.2.2]oct-3-vloxv)pyridazin-3-vll-1 H-indole hemifunarate The product of Example 7B (35mg, 0.11 mmol) was treated with fumaric acid 15 (23 mg, 0.2 mmol) in EtOAc/EtOH (v. 1:1, 3 mL) at ambient temperature for 10 h. The title compound was obtained as solid (42 mg, yield, 99%). 'H NMR (300 MHz,

CD

3 0D) 6 1.76-1.91 (m, 1H), 1.92-2.13 (m, 2H), 2.22-2.36 (m, 1H), 2.51-2.59 (m, 1H), 3.12-3.40 (m, 5H), 3.77-3.88 (m, 1H), 5.42-5.51 (m, 1H), 6.56 (dd, J=2.0, 1.0Hz, 1H), 6.67 (s, 1H), 7.27-7.33 (m, 2H), 7.52 (dt, J=8.5, 1.0 Hz, 1H), 7.74 (dd, J=8.8, 20 1.7 Hz, 1H), 8.10-8.16 (m, 2H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Anal. Calculated for C 1 9

H

2 0

N

4 0-0.55 C 4

H

4 0 4 : C, 66.27; H, 5.82; N, 14.58. Found: C, 66.12; H, 5.53; N, 14.63. Example 8 25 4-[6-(1 -Azabicyclo[2.2.2loct-3-vloxy)pvridazin-3-yll-1 H-indole Example 8A 4-[6-( -Azabicyclo[2.2.2]oct-3-yloxy)pyridazin-3-yll-1 H-indole Under N 2 , the mixture of Example 7A (168 mg, 0.7 mmol), 4-(4,4,5,5 30 tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-indole (ref. W002055517, 170 mg, 0.7 mmol), Pd 2 (dba) 3 (Aldrich, 19 mg, 0.02 mmol), 1,3-bis(2,6-iso -57propylphenyl)imidazolium chloride (Strem Chemicals, 26 mg, 0.06 mmol) and aqueous Na 2

CO

3 (2 M, 1 mL) in toluene (10 mL) was stirred at 110 *C overnight, After the reaction was complete, it was cooled down to room temperature and diluted with EtOAc (30 mL). The mixture was then washed with brine (2 x 5 mL) and the title 5 compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH: NH 3

-H

2 0, 90:10:1, Rf. 0.10) as solid (45 mg, yield, 20%). 1 H NMR (300 MHz, CD 3 0D) 6 1.51 1.65 (m, 1H), 1.70-1.93 (m, 2H), 2.01-2.16 (m, 1H), 2.31-2.39 (m, 1H), 2.78-3.09 (m, 5H), 3.45-3.56 (m, 1H), 5.30-5.38 (m, 1H), 6.78 (dd, J=3.4, 1.0 Hz, 1H), 7.25 (t, J=7.8 Hz, 1H), 7.30 (d, J=9.5 Hz, 1H), 7.36 (d, J=3.1 Hz, 1H), 7.40 (dd, J=7.5, 1.0 10 Hz, 1H), 7.52 (dt, J= 8.1, 1.0 Hz, 1H), 8.07 (d, J=9.2 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Example 8B 4-[6-( 1-Azabicvclo[2.2.2loct-3-vloxv)pvridazin-3-yll-1 H-indole funarate 15 The product of Example 8A (45 mg, 0.14 mmol) was treated with fumaric acid (23 mg, 0.2 mmol) in EtOAc/EtOH (v. 1:1, 3 mL) at ambient temperature for 10 h. The title compound was obtained as solid (56 mg, yield, 85%). 1 H NMR (300 MHz,

CD

3 0D) 6 1.90-2.23 (m, 3H), 2.33-2.48 (m, 1H), 2.62-2.70 (m, 1H), 3.21-3.54 (m, 5H), 3.92-4.03 (m, 1H), 5.54-5.62 (m, 1H), 6.69 (s, 2.5H), 6.78 (dd, J=3.4, 1.0 Hz, 20 1H), 7.26 (t, J=7.5 Hz, 1H), 7.35-7.44 (m, 3H), 7.55 (dt, J=8.1, 1.1 Hz, 1H), 8.13 (d, J=9.2 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Anal. Calculated for

C

19

H

20

N

4 0-1.3 C 4

H

4 0 4 : C, 61.67; H, 5.39; N, 11.89. Found: C, 61.49; H, 5.52; N, 12.17. 25 Example 9 5-f6-[(3R)-1 -Azabicyclo[2.2.2loct-3-vloxylpyridazin-3-vl}-1 H-indole Example 9A (3R)-3-[(6-Chloropyridazin-3-yl)oxvlquinuclidine 30 The product of Example 4A (635 mg, 5 mmol) was coupled with 3,6 dichloropyridazine (Aldrich, 925 mg, 6.25 mmol) according to the procedure of -58- Example 7A. The title compound was purified by chromatography (SiO 2 , CH 2 Cl 2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.45) as solid (750 mg, yield, 63%). 1 H NMR (300 MHz, CD 3 0D) 6 1.54-1.68 (m, 1H), 1.71-1.95 (m, 2H), 2.00-2.14 (m, 1H), 2.28-2.36 (m, 1H), 2.83-3.08 (m, 5H), 3.44-3.56 (m, 1H), 5.23-5.30 (m, 1H), 7.24 (d, J= 9.2 Hz, 5 1H), 7.66 (d, J= 9.2 Hz, 1H) ppm. MS (DCI/NH 3 ): 240 (M+H)*, 242 (M+H)*. Example 9B 5-{6-[(3R)-1-Azabicyclo[2.2.2loct-3-vloxylpyridazin-3-vl}-1 H-indole The product of Example 9A (480 mg, 2 mmol) was coupled with 5 10 indolylboronic acid (Frontier, 403 mg, 2.5 mmol) according to the procedure of Example 3A. The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (240 mg, yield, 38%). 'H NMR (300 MHz, CD 3 0D) 6 1.49-1.64 (m, 1H), 1.68-1.93 15 (m, 2H), 2.00-2.15 (m, 1H), 2.28-2.36 (m, 1H), 2.76-3.05 (m, 5H), 3.43-3.55 (m, 1H), 5.26-5.34 (m, 1H), 6.56 (dd, J=3.4, 1.0 Hz, 1H), 7.25 (d, J=9.2 Hz, 1H), 7.31 (d, J=3.1 Hz, 1H), 7.50 (d, J= 8.5 Hz, 1H), 7.74 (dd, J=8.5, 1.7 Hz, 1H), 8.08 (d, J=9.5 Hz, 1H), 8.14 (d, J=1.4 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. 20 Example 9C 5-{6-[(3R)-1 -Azabicyclo[2.2.2loct-3-yloxylpyridazin-3-vll-1 H-indole funarate The product of Example 9B (240 mg, 0.75 mmol) was treated with fumaric acid (93 mg, 0.8 mmol) in EtOAc/EtOH (v. 1:1, 10 mL) at ambient temperature for 15 h. The title compound was obtained as solid (247 mg, yield, 72%). 1 H NMR (300 25 MHz, CD 3 0D) 5 1.88-2.22 (m, 3H), 2.31-2.47 (m, 1H), 2.59-2.68 (m, 1H), 3.23-3.50 (m, 5H), 3.89-4.00 (m, 1H), 5.49-5.57 (m, 1H), 6.56(dd, J=3.0, 1.0 Hz, 1H), 6.69 (s, 2H), 7.29-7.35 (m, 2H), 7.52 (dt, J= 8.5, 1.0 Hz, 1H), 7.74 (dd, J=8.5, 1.7 Hz, 1H), 8.12-8.17 (m, 2H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Anal. Calcd. for ClgH 2 0

N

4 0-1.1 C 4

H

4 04-0.4 H 2 0: C, 61.73; H, 5.58; N, 12.31. Found: C, 61.67; H, 30 5.52; N, 12.33. -59- Example 10 5-{6-[(3R)-1 -Azabicyclo[2.2.2loct-3-yloxylpyridazin-3-vl}-3-methyl-1 H-indole Example 10A 5 3-Methyl-5-(4.4,5,5-tetramethyl-1,3,2-dioxaborolan-2-vl)-1 H-indole Under N 2 , a mixture of 5-bromo-3-methyl-1 H-indole (Aldrich, 1.05 g, 5 mmol), bis(pinacolato)diboron (Aldrich, 1.40 g, 5.5 mmol), PdCl 2 (dppf)-CH 2 Cl 2 (Aldrich, 122 mg, 0.15 mmol) and KOAc (Aldrich, 1.47 g, 15 mmol) in DMSO (20 mL) was stirred at 90 *C for 1 h. The reaction was monitored with TLC. After the reaction was 10 complete, it was then diluted with EtOAc (100 mL) and washed with brine (3 x 10 mL). The organic solution was then concentrated and the title compound was purified by flash chromatography (Si0 2 , Hexane : EtOAc, 80:20, Rf. 0.70) as solid (510 mg, yield, 40%). 1 H NMR (300 MHz, CDCl 3 ) 6 1.38 (s, 12H), 2.35 (s, 3H), 6.98 (s, 1H), 7.34 (dd, J=8.1, 0.7, Hz, 1H), 7.65 (dd, J=8.1, 1.0 Hz, 1H), 8.12 (s, 1H) ppm. 15 MS (DCI/NH 3 ): m/z 258 (M+H)*. Example 10B 5-{6-[(3R)-1 -Azabicyclo[2.2.2loct-3-yloxylpyridazin-3-yll-3-methyl-1 H-indole The product of Example 10A (240 mg, 1 mmol) coupled with the product of 20 Example 9A (250 mg, 1mmol) according to the procedure in Example 8A, The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min. flow rate, 75 mL/min., uv, 250 nm) as solid (40 mg, yield, 12%). 1 H NMR (300 MHz, CD 3 0D) 6 1.50-1.64 (m, 1H), 1.69-1.92 (m, 2H), 2.01-2.14 (m, 1H), 25 2.29-2.35 (m, 1H), 2.37 (s, 3H), 2.81-3.04 (m, 5H), 3.43-3.55 (m, 1H), 5.27-5.34 (m, 1H), 7.06 (d, J=1.4 Hz, , 1H), 7.24 (d, J=9.2 Hz, 1H), 7.44 (dd, J=8.5, 0.7 Hz, 1H), 7.71 (dd, J=8.8, 2.0, Hz, 1H), 8.07-8.12 (m, 2H) ppm. MS (DCI/NH 3 ): m/z 335 (M+H)*. 30 Example 10C 5-{6-[(3R)-1-Azabicyclo[2.2.2loct-3-yloxylpyridazin-3-yll-3-methyl-1 H-indole fumarate -60- The product of Example 10B (40 mg, 0.12 mmol) was treated with fumaric acid (23 mg, 0.2 mmol) in EtOAc/EtOH (v. 1:1, 5 mL) at ambient temperature for 10 h. The title compound was obtained as solid (40 mg, yield, 62%). 1 H NMR (300 MHz,

CD

3 0D) 6 1.90-2.24 (m, 3H), 2.33-2.48 (m, 4H), 2.61-2.68 (m, 1H), 3.22-3.53 (m, 5 5H), 3.93-4.03 (m, 1H), 5.51-5.58 (m, 1H), 6.70 (s, 3.6 H), 7.08 (d, J=1.0 Hz, IH), 7.32 (d, J=9.5 Hz, 1H), 7.45 (d, J=8.5 Hz, 1H), 7.72 (dd, J=8.8, 1.7 Hz, 1H), 8.10 (d, J=1.7 Hz, 1H), 8.17 (d, J=9.5 Hz, 1H) ppm. MS (DCI/NH 3 ): m/z 335 (M+H)*. Anal. Calculated for C 2 0H 22

N

4 0-1.8 C 4

H

4 0 4 : C, 60.13; H, 5.42; N, 10.31. Found: C, 60.02; H, 5.53; N, 10.27. 10 Example 11 5-{2-[(3R)-1 -Azabicyclo[2.2.2loct-3-vloxvlpvrimidin-5-yll-1 H-indole Example 1 1A 15 (3R)-3-[(5-Bromopyrimidin-2-yl)oxylquinuclidine The product of Example 4A (508 mg, 4 mmol) was coupled with 5-bromo-2 iodo-pyrimidine (Aldrich, 1.42 g, 5 mmol) according to the procedure of Example 7A. The title compound was purified by chromatography (Si0 2 , CH 2 Cl 2 : MeOH :

NH

3

-H

2 0, 90:10:1, Rf. 0.40) as solid (760 mg, yield, 67%). 'H NMR (300 MHz, 20 CD 3 0D) 6 1.54-1.68 (m, 1H), 1.68-1.95 (m, 2H), 2.03-2.16 (m, 1H), 2.24-2.33 (m, 1H), 2.82-3.11 (m, 5H), 3.41-3.52 (m, 1H), 5.09-5.17 (m, 1H), 8.65 (s, 2H). MS

(DCI/NH

3 ): 284 (M+H)* 286 (M+H)*. Example 11B 25 5-f2-[(3R)-1-Azabicyclo[2.2.2loct-3-vloxylpyrimidin-5-yll-1 H-indole The product of Example 11A (283 mg, 1 mmol) was coupled with 5 indolylboronic acid (Aldrich, 193 mg, 1.2 mmol) according to the procedure of Example 3A. The title product was purified by preparative HPLC (Gilson, column, Symmetry C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. 30 TFA) (v. 90/10 to 10/90 over 20 min. flow rate, 75 mL/min., uv, 250 nm) as solid (40 mg, yield, 12%). 1 H NMR (300 MHz, CD 3 0D) 6 1.50-1.63 (m, 1H), 1.67-1.93 (m, -61- 2H), 2.04-2.17 (m, 1H), 2.24-2.31 (m, 1H), 2.75-3.05 (m, 5H), 3.38-3.48 (m, 1H), 5.14-5.21 (m, 1H), 6.53 (dd, J=3.1, 0.7 Hz, 1H), 7.30 (d, J= 3.1 Hz, 1H), 7.35 (dd, J=8.5, 1.7 Hz, 1H), 7.51 (dt, J=8.5, 0.7 Hz, 1H), 7.80 (dd, J=1.7, 0.7 Hz, 1H), 8.82 (s, 2H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. 5 Example 11C 5-{2-[(3R)-1-Azabicyclo[2.2.2]oct-3-vloxylpyrimidin-5-vl}-1H-indole hemifumarate The product of 11B (40 mg, 0.12 mmol) was treated with fumaric acid (12 mg, 0.1 mmol) in EtOAc/EtOH (v. 1:1, 3 mL) at ambient temperature for 10 h. The title 10 compound was obtained as solid (42 mg, yield, 88%). 'H NMR (300 MHz, CD 3 0D) 6 1.72-2.10 (m, 3H), 2.20-2.34 (m, 1H), 2.43-2.51 (m, 1H), 3.04-3.43 (m, 5H), 3.65 3.76 (m, 1H), 5.28-5.36 (m, 1H), 6.52 (dd, J=3.1, 1.1 Hz, 1H), 6.67 (s, 1H), 7.30 (d, J=3.1 Hz, 1H), 7.35 (dd, J=8.5, 1.7 hz, 1H), 7.51 (dt, J=8.5, 0.7 Hz, 1H), 7.80 (dd, J=1.7, 0.7 Hz, 1H), 8.84 (s, 2H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Anal. Calcd. 15 for C 1 9

H

2 0

N

4 0-0.6 C 4

H

4 0 4 : C, 65.90; H, 5.79; N, 14.36. Found: C, 65.65; H, 5.24; N, 14.41. Example 12 4-f2-[(3R)-1 -Azabicyclo[2.2.2loct-3-vloxylpyrimidin-5-yll-1 H-indole 20 Example 12A 4-f2-[(3R)-1 -Azabicyclo[2.2.2loct-3-vloxylpyrimidin-5-vll-1 H-indole The product of Example 11A (170 mg, 0.6 mmol) was coupled with 4-(4,4,5,5 tetra-methyl-[1,3,2]dioxaborolan-2-yl)-1H-indole ((ref. W002055517, 146 mg, 0.6 25 mmol) according to the procedure in Example 8A. The title compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.10) as a solid (76 mg, yield, 40%). 1 H NMR (300 MHz, CD 3 0D) 6 1.50-1.64 (m, 1H), 1.67-1.93 (m, 2H), 2.05-2.19 (m, 1H), 2.25-2.33 (m, 1H), 2.73-3.12 (m, 5H), 3.39-3.50 (m, 1H), 5.17-5.25 (m, 1H), 6.55 (dd, J= 3.4, 1.0 Hz, 1H), 7.11 (dd, J=7.1, 1.0, Hz, 1H), 7.23 30 (t, J=8.1 Hz, 1H), 7.35 (d, J=3.1 Hz, 1H), 7.44-7.49 (m, 1H), 8.85 (s, 2H) ppm. MS

(DCI/NH

3 ): m/z 321 (M+H)*. -62- Example 12B 4-{2-[(3R)-1 -Azabicyclo[2.2.2]oct-3-vloxylpyrimidin-5-yl}-1 H-indole fumarate The product of Example 12A (76 mg, 0.24 mmol) was treated with fumaric 5 acid (29 mg, 0.25 mmol) in EtOAc/EtOH (v. 1:1, 4 mL) at ambient temperature for 10 hours. The title compound was obtained as solid (94.6 mg, yield, 90%). 1 H NMR (300 MHz, CD 3 0D) 6 1.88-2.21 (m, 3H), 2.33-2.48 (m, 1H), 2.59-2.66 (m, 1H), 3.22 3.50 (m, 5H), 3.84-3.95 (m, 1H), 5.41-5.49 (m, 1H), 6.55 (dd, J=3.4, 1.0 Hz, 1H), 6.68 (s, 2H), 7.11 (dd, J=7.5, 1.0 Hz, 1H), 7.24 (t, J= 8.1 Hz, 1H), 7.36 (d, J=3.1 Hz, 10 1H), 7.48 (dt, J=8.1, 0.7 Hz, 1H), 8.89 (s, 2H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Anal. Calculated for C 1

H

20

N

4 0-C 4

H

4 0 4 : C, 63.29; H, 5.54; N, 12.84. Found: C, 62.95; H, 5.85; N, 12.61. Example 13 15 5-f2-[(3S)-1 -Azabicyclo[2.2.2loct-3-vloxylpyrimidin-5-yll-1 H-indole Example 13A (3R)-1-Azabicyclo[2.2.2loct-3-yl benzoate (L)-tartrate (+/-)-3-Quinuclidinol benzoate (Sigma, 17.9 g, 77.5 mmol) was treated with L 20 tartaric acid (Aldrich, 99% ee, 11.63 g, 77.5 mmol) in EtOH (80%, 222 mL) at ambient temperature for 1 week. The white solid was filtered off and dried under reduced pressure. 6.5 g of 3-(R)-quinuclidinol benzoate - (L)-tartrate was obtained with -80% ee (assayed by HPLC. HPLC conditions: chiralpak AD column 25cmX4mm ID. solvent, EtOH : hexanes = 15: 85. flow rate, 1 mL/min. uv, 220 nm. 25 Retention time: (S)-3-quinuclidinol benzoate, 7.87 min; (R)-3-quinuclidinol benzoate 13.3 min.) Recrystallization of the above solid in EtOH (80%, 35 mL) gave the title product (4.5 g , yield, 15%, >98% ee). MS (DCI/NH 3 ) m/z 232 (M+H)*. Example 13B 30 (3R)-Quinuclidin-3-ol -63- The product of the Example 13A (4.5 g, 11.8 mmol) was treated with Hydrolysis was NaOH (15%, 40 mL) MeOH (40 mL)at 50*C for 10h. The methanol was removed under reduced pressure and the residue was extracted with chloroform (4 x 80 mL). The extracts were combined and dried over MgSO 4 (anhydrous). The 5 drying agents were filtered off and the filtrate was concentrated to give the title product as white solid (1.35 g, yield, .90%). MS (DCI/NH 3 ) m/z 128 (M+H)*. Example 13C (3S)-1-Azabicyclo[2.2.2loct-3-yl benzoate (D)-tartrate 10 The mother liquid of Example 13A was combined and concentrated under reduced pressure. The residue was then treated with NaOH (1 N, 50 mL) at room temperature for 30 min. It was extracted with chloroform (3 x mL) The extracts were combined and dried (MgSO 4 ). The drying agents were filtered off. The filtrates was concentrated to give 3-quinuclidinol benzoate (15.25 g, 66 mmol) It was then treated 15 with (D)-tartaric acid (Aldrich, 97%ee, 9.9 g, 66 mmol,) in EtOH (80%, 190 ml) at room temperature for 3 days according to the procedure of Example 1A. The title product was obtained (7.0 g, yield, 28%, 92.3% ee). Example 13D 20 (3S)-Quinuclidin-3-ol The product of Example 13C (7.0 g, 18.4 mmol) was treated with NaOH (aqueous) according to the procedure of Example 1 B. The title product was obtained as white solid (2.0 g, yield, 86%) MS (DCI/NH 3 ) m/z 128 (M+H)*. 25 Example 13E (3S)-3-[(5-Bromopyrimidin-2-vl)oxvlpuinuclidine The product of Example 13D (508 mg, 4 mmol) was coupled with 2-iodo-5 bromo-pyrimidine (1.42 g, 5 mmol) according to the procedure of Example 7A.The title compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 30 90:10:1, Rf. 0.20) as solid (780 mg, yields, 69%)as a solid. 1 H NMR (300 MHz,

CD

3 0D) 6 1.47-1.61 (m, 1H), 1.63-1.90 (m, 2H), 1.96-2.12 (m, 1H), 2.19-2.27 (m, -64- 1H), 2.73-3.03 (m, 5H), 3.33-3.45 (m, 1H), 5.05-5.14 (m, 1H), 8.64 (s, 2H) ppm. MS

(DCI/NH

3 ): 284 (M+H)* 286 (M+H)*. Example 13F 5 5-{2-[(3S)-1-Azabicyclo[2.2.2loct-3-vloxylpyrimidin-5-vll-1H-indole The product of Examplel3E (283 mg, 1 mmol) was coupled with 5 indolylboronic acid (193 mg, 1.2 mmol) according to the procedure of Example 3A, The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (120 mg, yield, 38%). 1 H NMR (300 MHz, CD 3 0D) 6 1.50-1.63 (m, 1H), 1.66-1.92 (m, 2H), 2.03 2.18 (m, 1H), 2.24-2.32 (m, 1H), 2.75-3.07 (m, 5H), 3.38-3.49 (m, 1H), 5.13-5.21 (m, 1H), 6.53 (dd, J=3.0, 0.7 Hz, 1H), 7.30 (d, J=3.4 Hz, 1H), 7.35 (dd, J=8.5, 1.7 Hz, 1H), 7.51 (dt, J=9.2, 0.7 Hz, 1H), 7.80 (dd, J=1.7, 0.7 Hz, 1H), 8.81 (s, 2H) ppm. MS 15 (DCI/NH 3 ): m/z 321 (M+H)*. Example 13G 5-{2-[(3S)-1-Azabicyclo[2.2.2loct-3-yloxylpyrimidin-5-yll-1H-indole henifumarate The product of Example 13F (120mg, 0.38 mmol) was treated with fumaric 20 acid (44 mg, 0.38 mmol) in EtOAc/EtOH (v. 1:1, 10 mL). The title compound was obtained as solid (123 mg, yield, 84%). 1 H NMR (300 MHz, CD 3 0D) 6 1.75-2.13 (m, 3H), 2.22-2.37 (m, 1H), 2.46-2.54 (m, 1H), 3.03-3.45 (m, 5H), 3.68-3.79 (m, 1H), 5.30-5.38 (m, 1H), 6.52 (dd, J=3.1, 1.1 Hz, 1H), 6.67 (s, 1.2H), 7.30 (d, J=3.1 Hz, 1H), 7.35 (dd, J=8.5, 1.7 Hz, 1H), 7.51 (dt, J= 8.5, 0.7 Hz, 1H), 7.80 (dd, J=1.7, 0.7 25 Hz, 1H), 8.82 (s, 2H) ppm. MS (DCI/NH 3 ): m/z 321 (M+H)*. Anal. Calculated for

C

19

H

20

N

4 0-0.6 C 4

H

4 0 4 : C, 65.90; H, 5.79; N, 14.36. Found: C, 65.62; H, 5.76; N, 14.40. Example 14 30 5-[4-( -Azabicvclo[2.2.2]oct-3-yloxy)phenyll-3-methyl-1 H-indazole trifluoroacetate -65- The product of Example 1A (200 mg, 0.61 mmol) was coupled with t-butyl-(3 methyl-5-trimethylstannany-indazole)-1-carboxylate (ref. US 2003199511, 294 mg, 1 mmol) according to the procedure of Example 2B. The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting 5 Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min. flow rate, 75 mL/min., uv, 250 nm) as solid (70 mg, yield, 26%). 'H NMR (300 MHz, CD 3 0D) 6 1.85-2.13 (m, 3H), 2.22-2.37 (m, 1H), 2.46-2.50 (m, 1H), 2.58 (s, 3H), 3.23-3.45 (m, 5H), 3.78-3.86 (m, 1H), 4.90-5.00 (m, 1H), 7.07 (dt, J=8.8, 2.0 Hz, 2H), 7.50 (d, J=8.8 Hz, 1H), 7.61-7.68 (m, 3H), 7.85 (s, 1H) ppm. MS (DCI/NH 3 ): m/z 334 (M+H)*. 10 Anal. Calculated for C 21

H

23

N

3 0-1.0 CF 3

CO

2 H-0.5 H 2 0: C, 60.52; H, 5.52; N, 9.21. Found: C, 60.79; H, 5.39; N, 9.17. Example 15 6-[4-( -Azabicvclo[2.2.2loct-3-vloxv)phenyll-1,3-benzothiazol-2-amine 15 Example 15A 3-[(4'-Nitro-1, 1'-biphenyl-4-vl)oxvlquinuclidine 3-Quinuclidinol (Aldrich, 0.51 g, 4 mmol) was coupled with 4'-nitro-1,1' biphenyl-4-ol (TCl, 0.43 g, 2 mmol) with DIAD (di-isopropyl azadicarboxylate, 20 Aldrich, 0.81 g, 4 mmol) and Ph 3 P (Aldrich, 1.04 g, 4 mmol) in THF (anhydrous, Aldrich, 40 mL) at ambient temperature for two days. The reaction mixture was concentrated. The title product was purified by chromatography (SiO 2 , CH 2 Cl 2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.20) as solid (400 mg, yield, 62%). 'H NMR ( 300 MHz, CD 3 0D) 8 1.45-1.57 (m, 1H), 1.63-1.91 (m, 2H), 1.97-2.12 (m, 1H), 2.17-2.24 25 (m, 1H), 2.66-3.00 (m, 5H), 3.30-3.41 (m, 1H), 4.56-4.64 (m, 1H), 7.05 (dt, J=8.8, 2.6 Hz, 2H), 7.68 (dt, J=9.2, 2.6 Hz, 2H), 7.82 (dt, J=8.8, 2.7 Hz, 2H), 8.28 (dt, J=8.8, 2.8 Hz, 2H) ppm. MS (DCI/NH 3 ) m/z 325 (M+H)*. Example 15B 30 4'-( -Azabicyclo[2.2.2loct-3-vloxy)-1,1 '-biphenyl-4-amine -66- The product of Example 15A (300 mg, 0.92 mmol) was treated with Pd/C (Aldrich, wt.10%, 30 mg) in methanol (20 mL) under H 2 at ambient temperature for 30 min. After the reaction was complete, the catalyst was removed through a short column of diatomaceous earth. The filtrate was concentrated under reduced 5 pressure to provide the title compound (200 mg, yield, 74%). 1 H NMR (300 MHz,

CD

3 0D) 8 1.44-1.58 (m, 1H), 1.63-1.89 (m, 2H), 1.99-2.13 (m, 1H), 2.15-2.23 (m, 1H), 2.72-3.04 (m, 5H), 3.29-3.39 (m, 1H), 4.50-4.58 (m, 1H), 6.77 (dt, J= 8.8, 2.5 Hz, 2H), 6.91 (dt, J=8.8, 2.4 Hz, 2H), 7.32 (dt, J= 8.5, 2.5 Hz, 2H), 7.43 (dt,J= 9.2, 2.8 Hz, 2H) ppm. MS (DCI/NH 3 ) m/z 295 (M+H)*. 10 Example 15C 6-[4-(1 -Azabicyclo[2.2.2loct-3-vloxv)phenyll-1,3-benzothiazol-2-amine The product of Example 15B (200 mg, 0.68 mmol) and KSCN (Aldrich, 140 mg, 1.52 mmol) were dissolved in HOAc (5 mL). Bromine [Aldrich, 99%, 40 pL, 0.76 15 mmol, in HOAc (1 mL) was added slowly to the above solution over 5 min. The mixture was stirred at ambient temperature for additional 1 h. and then quenched with aqueous NaOH (10%, 20 mL) at 5-10 0C. It was then extracted with CHCl3/'PrOH (v. 10 : 1, 2 x 50 mL). The extracts were combined and concentrated under reduced pressure. The title compound was purified by chromatography (SiO 2 , 20 CH 2

CI

2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.10) as solid (140 mg, yield, 59%). 1 H NMR (300 MHz, CD 3 0D) 8 1.27-1.37 (m, 1H), 1.51-1.72 (m, 2H), 1.79-1.88 (m, 1H), 2.02 2.07 (m, 1H), 2.51-2.84 (m, 5H), 3.21-3.39 (m, 1H), 4.45-4.52 (m, 1H), 6.97(d, J=8.8 Hz, 2H), 7.35 (d, J=8.5 Hz, 7.45 (dd, J=8.5, 2.1 Hz, 1H), 7.55 (d, J=8.5, 2H), 7.90 (d, J=2.0 Hz, 1H) ppm. MS (DCI/NH 3 ) m/z 352 (M+H)*. 25 Example 15D 6-[4-(1-Azabicyclo[2.2.2loct-3-yloxv)phenyll-1,3-benzothiazol-2-amine bistrifluoroacetate The product of Example 15C (140 mg, 0.4 mmol) was treated with 30 trifluroacetic acid (Aldrich, 99%, 114 mg, 80 pL, 1 mmol) in 'PrOH (5 mL) at ambient temperature for 15 h. The title compound was obtained as solid (90 mg, yield, 39%). -67- 'H NMR (300 MHz, DMSO-D 6 ) 6 1.75-2.16 (m, 3H), 2.30-2.52 (m, 2H), 3.03-3.45 (m, 5H), 3.75-3.82 (m, 1H), 4.78-4.85 (m, 1H), 7.05 (d, J=8.8 Hz, 2H), 7.38 (d, J=8.5 Hz, 1H), 7.50 (dd, J=8.5, 2.1 Hz, 1H), 7.62 (d, J=8.8 Hz, 2H), 7.76 [s(broad.), 2H], 7.96 (d, J=1.7 Hz, 1 H) ppm. MS (DCI/NH 3 ): m/z 352 (M+H)*. Anal. Calculated for 5 C 20

H

2 1

N

3 OS-2.08 CF 3

CO

2 H C, 49.30; H, 3.95; N, 7.14. Found: C, 49.70; H, 3.42; N, 7.03. Example 16 6-{4-[(3R)-1 -Azabicyclo[2.2.2Ioct-3-vloxylphenyll-1,3-benzothiazol-2-amine 10 Example 16A (3R)-3-[(4'-Nitro-1,1 '-biphenyl-4-vl)oxvlquinuclidine The product of Example 4A (1.28 g, 10 mmol) was coupled with 4-iodo-4' nitro-biphenyl (TCI, 1.62 g, 5 mmol) according to the procedure of Example 1A. The title product was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 15 90:10:1, Rf. 0.20) as solid (930 mg, yield, 57%). 1 H NMR (300 MHz, CD 3 0D) 8 1.45-1.57 (m, 1H), 1.63-1.91 (m, 2H), 1.97-2.12 (m, 1H), 2.17-2.24 (m, IH), 2.66 3.00 (m, 5H), 3.30-3.41 (m, 1H), 4.56-4.64 (m, 1H), 7.05 (dt, J=8.8, 2.6 Hz, 2H), 7.68 (dt, J=9.2, 2.6 Hz, 2H), 7.82 (dt, J=8.8, 2.7 Hz, 2H), 8.28 (dt, J=8.8, 2.8 Hz, 2H) ppm. MS (DCI/NH 3 ) m/z 325 (M+H)*. 20 Example 16B 4'-[(3R)-1 -Azabicyclo[2.2.2loct-3-vloxyl-1,1 '-biphenyl-4-amine The product of Example 16A (580 mg, 1.79 mmol) was treated with Pd/C (Aldrich, wt.10%, 100 mg) in ethanol (50 mL) under H 2 at ambient temperature for 30 25 min. After the reaction was complete, the catalyst was removed through a short column of diatomaceous earth. The filtrate was concentrated under reduced pressure to provide the title compound (520 mg, yield, 99%). 1 H NMR (300 MHz,

CD

3 0D) 8 1.44-1.58 (m, 1H), 1.63-1.89 (m, 2H), 1.99-2.13 (m, 1H), 2.15-2.23 (m, 1H), 2.72-3.04 (m, 5H), 3.29-3.39 (m, 1H), 4.50-4.58 (m, 1H), 6.77 (dt, J= 8.8, 2.5 30 Hz, 2H), 6.91 (dt, J=8.8, 2.4 Hz, 2H), 7.32 (dt, J= 8.5, 2.5 Hz, 2H), 7.43 (dt,J= 9.2, 2.8 Hz, 2H) ppm. MS (DCI/NH 3 ) m/z 295 (M+H)*. -68- Example 16C 6-{4-[(3R)-1-Azabicvclo[2.2.2loct-3-vloxylphenyll-1,3-benzothiazol-2-amine tri(trifluoroacetate) 5 The product of Example 16B (250 mg, 0.85 mmol) and KSCN (Aldrich, 165 mg, 1.70 mmol) were dissolved in HOAc (5 mL). Bromine [Aldrich, 99%, 47 pL, 0.90 mmol, in HOAc (1 mL)] was slowly added to the above solution over 5 min. The mixture was stirred at ambient temperature for additional 2 hours, and quenched with aqueous NaOH (10%, 20 mL) at 5-10 0C. It was then extracted with CHCI3/'PrOH (v. 10 10 : 1, 2 x 50 mL). The extracts were combined and concentrated under reduced pressure. The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (150 mg, yield, 19%). 1 H NMR (300 MHz, DMSO-D 6 ) 6 1.84 - 2.20 (m, 3 H), 2.22 15 2.44 (m, 1 H), 2.47 - 2.69 (m, 1 H), 3.32 - 3.51 (m, 5 H), 3.74 - 3.93 (m, 1 H), 4.89 5.02 (m, 1 H), 7.01 - 7.15 (m, 2 H), 7.53 (d, J=8.5 Hz, 1 H), 7.59 - 7.66 (m, 2 H), 7.69 (dd, J=8.5, 1.7 Hz, 1 H), 7.98 (d, J=2.0 Hz, 1 H) ppm. MS (DC/NH 3 ): m/z 352 (M+H)*. Anal. Calculated for C 2 0

H

21

N

3 OS-3.00 CF 3

CO

2 H C, 45.03; H, 3.49; N, 6.06. Found: C, 44.70; H, 3.42; N, 6.00. 20 Example 17 6-{4-[(3R)-1 -Azabicyclo[2.2.2loct-3-yloxylphenyl}-4-thiocyanato-1,3-benzothiazol-2 amine trifluoroacetate The product of Example 16B (250 mg, 0.85 mmol) and KSCN (Aldrich, 165 25 mg, 1.70 mmol) were dissolved in HOAc (5 mL). Bromine [Aldrich, 99%, 47 pL, 0.90 mmol, in HOAc (1 mL)] was added slowly to the above solution over 5 min. according to procedure of Example 16C. The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) Flow rate, 30 75 mL/min., uv, 250 nm) as solid (55 mg, yield, 12%). 1 H NMR (300 MHz, MeOH D4) 6 1.79 - 2.24 (m, 3 H), 2.22 - 2.44 (m, 1 H), 2.46 - 2.65 (m, , 1 H), 3.30 - 3.52 (m, -69- 5 H), 3.74 - 3.90 (m, 1 H), 4.93 (dd, J=9.2, 5.1 Hz, 1 H), 6.96 - 7.23 (m, 2 H) 7.48 7.70 (m, 3 H) 7.88 (d, J=1.7 Hz, 1 H) ppm. MS (DCI/NH 3 ): m/z 409 (M+H)*. Example 18 5 6-{4-[(3R)-1 -Azabicyclo[2.2.2loct-3-yloxylphenyl}-4-bromo-1,3-benzothiazol-2-amine bis(trifluoroacetate) The product of Example 16B (250 mg, 0.85 mmol) and KSCN (Aldrich, 165 mg, 1.70 mmol) were dissolved in HOAc (5 mL). Bromine [Aldrich, 99%, 47 pL, 0.90 mmol, in HOAc (1 mL) was added slowly to the above solution over 5 min. 10 according to procedure of Example 16C. The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (50 mg, yield, 9%). 1 H NMR (300 MHz, MeOH-D 4 ) 6 1.78 - 2.21 (m, 3 H), 2.23 - 2.44 (m, 1 H), 2.47 - 2.63 (m, 1 H), 3.23 - 3.53 (m, 5 H), 3.66 - 3.97 (m, 1 15 H), 4.88 - 5.03 (m, 1 H), 6.96 - 7.22 (m, 2 H), 7.52 - 7.65 (m, 2 H), 7.68 (d, J=1.7 Hz, 1 H), 7.82 (d, J=1.7 Hz, 1 H) ppm. MS (DCI/NH 3 ): m/z 430 (M+H)*, 432 (M+H)*. Anal. Calculated for C 2 0H 2 OBrN 3 OS-2.00 CF 3

CO

2 H C, 43.78; H, 3.37; N, 6.38. Found: C, 44.70; H, 3.42; N, 6.32. 20 Example 19 N-[4-(3-Methyl-1 H-indazol-5-yl)phenyllquinuclidin-3-amine Example 19A N-(4-lodophenvl)quinuclidin-3-amine 25 3-Quinuclidinone hydrochloride (Aldrich, 3.22 g, 20 mmol) was treated with 4 iodo-aniline (Aldrich, 2.19 g, 10 mmol), Na 2

SO

4 (anhydrous, Aldrich, 7.40 g, 50 mmol) and NaBH(OAc) 3 (Aldrich, 3.16 g, 15 mmol) in HOAc (25 mL) at ambient temperature for 15 h. After the reaction was complete, the reaction mixture was slowly poured into a flask containing 75 mL of saturated NaHCO 3 and stirred for 20 30 min. It was then extracted with EtOAc (3 x 100 mL). The extracts were combined and washed with brine (2 x 20 mL). The organic solution was concentrated under -70reduced pressure and the title compound was purified by chromatography (Si0 2 ,

CH

2

CI

2 : MeOH : NH 3

H

2 0, 90:10:2, Rf. 0.10) as oil (3.24 g, yield, 98%). 1 H NMR (300 MHz, CD 3 0D,) 6 1.70-1.81 (m, 1H), 1.93-2.04 (m, 2H), 2.08-2.24 (m, 2H), 2.89 (ddd, J=12.9, 5.1, 2.7 Hz, 1H), 3.12-3.28 (m, 4H), 3.64 (ddd, J=12.9, 9.5, 2.4 Hz, 5 1H), 3.79-3.85 (m, 1H), 6.46 (dt, J=9.0, 2.7 Hz, 2H), 7.39 (dt, J=9.1, 2.7 Hz, 2H) ppm. MS (DCI/NH 3 ) m/z 329 (M+H)*. Example 19B N-[4-(3-Methyl-1 H-indazol-5-yl)phenyllquinuclidin-3-amine trifluoroacetate 10 The product of Example 19A (200 mg, 0.61 mmol) was coupled with t-Butyl (3-Methyl-5-trimethylstannanyl-indazole)-1-carboxylate (ref. US 2003199511, 294 mg, 1 mmol) according to the procedure of Example 2B. The title product was purified by preparative HPLC (Gilson, column, Symmetry@ C-8 7 pm, 40 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) 15 Flow rate, 75 mL/min., uv, 250 nm) as solid (28 mg, yield, 10%). 1 H NMR (300 MHz,

CD

3 0D) 6 1.85-1.96 (m, 1H), 2.08-2.15 (m, 2H), 2.24-2.40 (m, 2H), 2.59 (s, 3H), 3.02-3.15 (m, 1H), 3.20-3.45 (m, 4H), 3.78-3.88 (m, 1H), 3.98-4.06 (m, 1H), 6.77 (dt, J=8.8, 2.0 Hz, 2H), 7.46-7.52 (m, 3H), 7.59 (dd, J=8.9, 1.6 Hz, 1H), 7.78 (s, 1H) ppm..MS (DCI/NH 3 ): m/z 333 (M+H)*. Anal. Calculated for C 21

H

24

N

4 -1.25 CF 3

CO

2 H: 20 C, 59.43; H, 5.36; N, 11.80. Found: C, 59.20; H, 4.96; N, 11.62. Example 20 (R)- 3-[6-(3-Methyl-1 H-indazol-5-yl)-pyridazin-3-vloxyl-1 -aza-bicyclo[2.2.2]octane funarate 25 Example 20A 3-Methyl-5-trimethylstannanyl-indazole-1-carboxylic acid tert-butyl ester 5-Bromo-3-methyl-indazole-1-carboxylic acid tert-butyl ester (3.0 g, 9.6 mmol) was coupled with hexamethylditin (Aldrich, 4.73 g, 14.4 mmol) catalyzed by 30 Pd(PPh 3

)

4 (Aldrich, 1.1 g, 0.96 mmol) in anhydrous toluene (Aldrich, 50 mL) at 115 *C (oil bath) under N 2 for 2 h. After the reaction went to completion, the black -71reaction mixture was cooled down to ambient temperature and directly loaded to a flash silica gel column (5-30% EtOAc in hexane) for purification to provide the title compound (3.06 g, 80%). 'H NMR (MeOH-d 4 , 300 MHz) 0.23 - 0.45 (m, 9 H) 1.71 (s, 9 H) 2.59 (s, 3 H) 7.67 (d, J=8.1 Hz, 1 H) 7.87 (s, 1 H) 8.06 (d, J=8.5 Hz, 1 H) ppm. 5 MS (DCI/NH 3 ) m/z 397(M+H)*. Example 20B (R)-3-[6-(3-Methyl-1 H-indazol-5-vl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2loctane The product of Example 9A (120 mg, 0.5 mmol) was coupled with the product 10 of Example 20A (278 mg, 0.7 mmol) under the catalysis of by Pd 2 (dba) 3 (Aldrich, 24 mg, 0.025 mmol) and (tBu 3

P)

2 Pd (Strem Chemicals, 26 mg, 0.05 mmol) with CsF (Strem Chemicals, 152 mg, 1 mmol) in dioxane (10 ml) at 80*C under N 2 for 16 hours. After the reaction went to completion, it was diluted with EtOAc (50 mL) and washed with brine (2 x 10 mL). The organic solution was concentrated under 15 vacuum and the residue was treated with TFA (1 mL) in CH 2

CI

2 (5 mL) at ambient temperature for 2 hours. It was then concentrated. The title product was purified by preparative HPLC (Xterra

TM

, column, Xterra RP-18 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (68 mg, 41%). 1 H NMR (MeOH-D 4 , 300 20 MHz) 1.50 - 1.66 (m, 1 H) 1.70 - 1.94 (m, 2 H) 2.01 - 2.15 (m, 1 H) 2.29 - 2.37 (m, 1 H) 2.62 (s, 3 H) 2.81 - 3.04 (m, 5 H) 3.44 - 3.56 (m, 1 H) 5.28 - 5.36 (m, 1 H) 7.28 (d, J=9.2 Hz, 1 H) 7.59 (d, J=8.8 Hz, 1 H) 8.05 (dd, J=8.8, 1.4 Hz, 1 H) 8.16 (d, J=9.2 Hz, 1 H) 8.31 (s, 1 H) ppm. MS (DCI/NH 3 ) m/z 336 (M+H)*. 25 Example 20C (R)-3-[6-(3-Methyl-1 H-indazol-5-yl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2loctane funarate The product of Example 20B (68 mg, 0.11 mmol) was treated with fumaric acid (Aldrich, 14 mg, 0.12 mmol) in EtOAc/MeOH (v.10:1, 5 mL) to provide the title 30 compound as solid (59.1 mg, 65%). 1 H NMR (MeOH-D 4 , 300 MHz) 1.82 - 2.18 (m, 3 H) 2.27 - 2.42 (m, 1 H) 2.55 - 2.66 (m, 4 H) 3.21 - 3.43 (m, 5 H) 3.82 - 3.95 (m, 1 -72- H) 5.47 - 5.57 (m, 1 H) 6.68 (s, 2 H) 7.34 (d, J=9.2 Hz, 1 H) 7.60 (d, J=8.8 Hz, 1 H) 8.06 (dd, J=8.8, 1.7 Hz, 1 H) 8.21 (d, J=9.2 Hz, 1 H) 8.32 (s, 1 H) ppm. MS

(DCI/NH

3 ) m/z 336(M+H)*. Anal. Calculated for C 19

H

2 1N 5 O-1.0 C 4

H

4 04-0.35 H 2 0: C, 60.35; H, 5.66; N, 15.30. Found: C, 60.06; H, 5.40; N, 15.56. 5 Example 21 (R)-346-(1-Methyl-1 H-indol-5-yl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2loctane trifluoroacetate The product of Example 4A (120 mg, 0.5 mmol) was coupled with N-methyl 10 indole-5-boronic acid (Aldrich, 250 mg, 1.5 mmol) catalyzed by Pd 2 (dba) 3 (24 mg, 0.025 mmol) and (tBu 3

P)

2 Pd (26 mg, 0.05 mmol) with CsF (Strem Chemicals, 228 mg, 1.5 mmol) in dioxane (8 mL) at 80 0 C under N 2 for 16 hours according to the procedure of Example 20B. The title product was purified by preparative HPLC (Xterra T M , column, Xterra RP-18 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 15 (with 0.2% v. TFA) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (109.9 mg, 49%). 1H NMR (MeOH-D 4 , 300 MHz) 1.91 - 2.25 (m, 3 H), 2.34 - 2.48 (m, 1 H), 2.61 - 2.70 (m, 1 H), 3.33 - 3.56 (m, 5 H), 3.86 (s, 3 H), 3.94 4.04 (m, 1 H), 5.50 - 5.59 (m, 1 H), 6.56 (d, J=3.1 Hz, 1 H), 7.25 (d, J=3.1 Hz, 1 H), 7.29 - 7.36 (m, 1 H), 7.52 (d, J=8.8 Hz, 1 H), 7.81 (dd, J=8.6, 1.9 Hz, 1 H), 8.10 20 8.19 (m, 2 H) ppm. MS (DCI/NH 3 ) m/z 335 (M+H)*. Anal. Calculated for

C

20

H

22

N

4 0-1.075 C 2

F

3 0 2 H: C, 58.22; H, 5.09; N, 12.26. Found: C, 58.21; H, 5.00; N, 12.30. Example 22 25 (R)-{5-[6-(1-Aza-bicyclo[2.2.2loct-3-yloxy)-pyridazin-3-yll-1 H-indol-3-vlmethylh dimethyl-amine bis(fumarate) Example 22A (R)-{5-[6-( 1-Aza-bicyclo[2.2.2loct-3-yloxy)-pyridazin-3-yll-1 H-indol-3-ylmethyll 30 dimethyl-amine -73- The product of Example 9B (150 mg, 0.47 mmol) was treated with HCHO (Aldrich, 37%, 76 mg, 0.94 mmol) and dimethylamine (Aldrich, 42 mg, 0.94 mmol) in dioxane/HOAc (v. 1:1, 5 mL) at ambient temperature for 16 hours. It was then concentrated and the title product was purified by preparative HPLC (Xterra

TM

, 5 column, Xterra RP-18 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (80 mg, 45%). 1 H NMR (MeOH-D 4 , 300 MHz) 1.59 - 1.75 (m, 1 H), 1.77 - 1.99 (m, 2 H), 2.07 - 2.23 (m, 1 H), 2.36 - 2.44 (m, 1 H), 2.60 - 2.69 (m, 6 H), 2.91 - 3.13 (m, 5 H), 3.52 - 3.65 (m, 1 H), 4.22 (s, 2 H), 5.32 - 5.40 (m, 1 H), 7.30 (d, J=9.5 Hz, 1 10 H), 7.49 (s, 1 H), 7.56 (d, J=8.5 Hz, 1 H), 7.81 (dd, J=8.5, 1.7 Hz, 1 H), 8.15 (d, J=9.5 Hz, 1 H), 8.29 (s, 1 H) ppm. MS (DCI/NH 3 ) m/z 378(M+H)*. Example 22B (R)-{5-[6-( 1-Aza-bicyclo[2.2.2loct-3-vloxv)-pyridazin-3-vl-1 H-indol-3-vlmethyl} 15 dimethyl-amine bis(fumarate) The product of Example 22A (80 mg, 0.21 mmol) was treated with fumaric acid (Aldrich, 49 mg, 0.42 mmol) in EtOAc / MeOH (v. 10:1) to give the title compound as white solid (74.8 mg, 53%). 1 H NMR (MeOH-D 4 , 300 MHz) 1.79 - 2.17 (m, 3 H), 2.25 - 2.41 (m, 1 H), 2.54 - 2.61 (m, 1 H), 2.84 (s, 6 H), 3.19 - 3.42 (m, 5 20 H), 3.78 - 3.90 (m, 1 H), 4.50 (s, 2 H), 5.45 - 5.54 (m, 1 H), 6.66 (s, 5 H), 7.34 (d, J=9.2 Hz, 1 H), 7.54 - 7.63 (m, 2 H), 7.84 (dd, J=8.5, 1.7 Hz, 1 H), 8.17 (d, J=9.2 Hz, 1 H), 8.35 (s, 1 H) ppm. MS (DCI/NH 3 ) m/z 378(M+H)*. Anal. Calculated for

C

2 2

H

27

N

5 O-2.5 C 4

H

4 04-0.5 H 2 0: C, 56.80; H, 5.66; N, 10.35. Found: C, 56.62; H, 5.78; N, 10.09. 25 Example 23 (R)-3-[6-(1H-Indol-5-yl)-pyridazin-3-yloxyl-1-aza-bicvclo[2.2.2]octane 1-oxide trifluoroacetate The product of Example 9B was treated with H 2 0 2 (Aldrich, aq. 30% 1 mL, 30 8.8 mmol) in acetonitrile (3 mL) for 5 h. The mixture was quenched by Na 2

SO

3 solution carefully until no more peroxide was noticed, and it was then concentrated -74under vacuum. The title product was purified by preparative HPLC (Xterra

TM

, column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA), (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (15.6 mg, 13%). 1 H NMR (MeOH-d 4 , 300 MHz) 2.14 - 2.38 (m, 3 H) 2.55 - 2.71 (m, 2 5 H) 3.68 - 3.92 (m, 5 H) 4.37 - 4.47 (m, J=8.5 Hz, 1 H) 5.62 - 5.70 (m, J=4.4 Hz, 1 H) 6.57 (d, J=2.0 Hz, 1 H) 7.30 - 7.38 (m, 2 H) 7.52 (d, J=8.5 Hz, 1 H) 7.74 (dd, J=8.6, 1.9 Hz, 1 H) 8.13 - 8.20 (m, 2 H) ppm. MS (ESI) m/z 337(M+H)*. Anal. Calculated for

C

1 gH 20

N

4 02-1.15 CF 3

CO

2 H: C, 54.72; H, 4.56; N, 11.98. Found: C, 54.72; H, 4.07; N, 12.08. 10 Example 24 6-f6-[(3R)-1 -Aza-bicyclo[2.2.2loct-3-yloxyl-pyridazin-3-yl}-benzothiazol-2 vlamine tri(hydrogen chloride) 15 Example 24A 6-(4-Bromo-phenyl)-4,5-dihvdro-2H-pyridazin-3-one 4-(4-Bromo-phenyl)-4-oxo-butyric acid (Aldrich, 25.0 g, 97.3 mmol) was treated with NH 2

NH

2

H

2 0 (Aldrich, 55%, 9.1 mL, 156 mmol) in EtOH (Aldrich, 100 mL) at refluxing for 2h. It was cooled down to ambient temperature and the white 20 solid was filtered off to give the title compound (24.2 g, 98%) 1 H NMR (CDCl 3 , 300 MHz) 8 2.50 - 2.76 (m, 2 H), 2.85 - 3.09 (m, 2 H), 7.43 - 7.71 (m, 4 H), 8.55 (s, 1 H) ppm. MS (DCI/NH 3 ) m/z 253 (M+H)*, 255 (M+H)*, 270 (M+NH 4 )*, 272 (M+NH 4 )*. Example 24B 25 6-(4-Bromo-phenyl)-4.5-dihydro-2H-pyridazin-3-one The product of Example 24A (24.0 g, 95 mmol) was oxidized with bromine (Aldrich, 18.81g, 6.1 mL, 104.5 mmol) in HOAc (Aldrich, 200 mL) at 100*C for 1h. The brown mixture was then cooled down to ambient temperature. The white solid was filtered off and the filtrate was washed with water (2 x 20 mL). The solid was 30 collected and dried under vacuum to give the title compound (25.0 g, 100%). 1 H NMR (CDCl 3 , 300 MHz) 8 7.07 (d, J=10.2 Hz, 1 H), 7.55 - 7.69 (m, 4 H), 7.72 (d, -75- J=9.8 Hz, 1 H) ppm. MS (DCI/NH 3 ) m/z 251 (M+H)*, 253 (M+H)*, 268 (M+NH4)*, 270

(M+NH

4 )*. Example 24C 5 3-(4-Bromo-phenyl)-6-chloro-pyridazine The product of Example 24B (25.0g, 100 mmol) was stirred in POC1 3 (Aldrich, 200 mL) at 100*C for 18 h. Most of POCl 3 was then distilled off (around 150 mL was collected). The residue was then poured into 300 mL of ice/water and stirred vigorously for 1h. The solid was filtered off. The filtrate was washed with water (2 x 10 50 mL) and dried under vacuum to give the title compound (26.2 g, 98%). 1 H NMR (MeOH-D 4 , 300 MHz) 8 7.72 (d, J=8.8 Hz, 2 H), 7.86 (d, J=8.8 Hz, 1 H), 8.02 (d, J=8.8 Hz, 2 H), 8.19 (d, J=9.2 Hz, 1 H) ppm. MS (DCI/NH 3 ) m/z 269 (M+H)*, 271 (M+H)*, 273 (M+H)*. 15 Example 24D (3R)-3-[6-(4-Bromo-phenvl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2loctane The product of Example 24C (2.43 g, 9 mmol) was coupled with the product of Example 4A (1.27g, 10 mmol) using t-BuOK (Aldrich, 1.12g, 10 mmol) as base in THF (anhydrous, Aldrich, 50 mL) according to the procedure of Example 7A. The title 20 compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 90:10:2, Rf. 0.30) as slightly yellow solid (3.30g, 100%). 1 H NMR (MeOH-D 4 , 300 MHz) 1.47 - 1.66 (m, 1 H), 1.66 - 1.93 (m, 2 H), 1.96 - 2.18 (m, 1 H), 2.23 - 2.42 (m, 1 H), 2.71 - 3.06 (m, 5 H), 3.38 - 3.58 (m, 1 H), 5.17 - 5.47 (m, 1 H), 7.28 (d, J=9.2 Hz, 1 H), 7.59 - 7.78 (m, 2 H), 7.82 - 7.99 (m, 2 H), 8.06 (d, J=9.2 Hz, 1 H) ppm. MS 25 (DCI/NH 3 ) m/z 360 (M+H)*, 362 (M+H)*. Example 24E {4-[6-[(3R)-1 -Aza-bicyclo[2.2.21oct-3-vloxyl-pyridazin-3-vil-phenvl}-benzhydrylidene amine 30 The product of Example 24D (360 mg, 1 mmol) was coupled with benzhydrylideneamine (Aldrich, 270 mg, 1.5 mmol) under the catalysis of Pd2(dba) 3 -76- (Aldrich, 18.3 mg, 0.02 mmol) and Xantphos (Strem Chemicals, 36 mg, 0.06 mmol) with t-BuONa (Aldrich, 150 mg, 1.5 mmol) in toluene (anhydrous, Aldrich, 10 mL) at 100*C for 2h. The mixture was then cooled down to ambient temperature and diluted with EtOAc (50 mL), washed with water (2 x 5 mL). The organic solution was 5 concentrated and the title compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 90:10:1, Rf. 0.4) as a solid (360 mg, yield, 78%). 'H NMR (300 MHz, CD 3 0D) 6 1.45 - 1.63 (m, 1 H), 1.64 - 1.94 (m, 2 H), 1.94 - 2.13 (m, 1 H), 2.23 - 2.41 (m, 1 H), 2.71 - 3.06 (m, 5 H), 3.39 - 3.55 (m, 1 H), 5.10 - 5.37 (m, 1 H), 6.82 6.93 (m, 2 H), 7.12 - 7.23 (m, 3 H), 7.25 - 7.35 (m, 3 H), 7.39 - 7.57 (m, 3 H), 7.67 10 7.74 (m, 2 H), 7.74 - 7.83 (m, 2 H), 7.96 (d, J=9.2 Hz, 1 H) ppm. MS (DCI/NH 3 ): 461 (M+H)*. Example 24F 4-{6-[(3R)-1 -Aza-bicyclo[2.2.2loct-3-vloxyl-pyridazin-3-vll-phenvlamine 15 The product of Example 24E (360 mg, 0.78 mmol) was treated with HCI (aq. 10%, 5 mL) in THF (5 mL) at ambient temperature for 4 h. It was then concentrated and the title compound was purified by chromatography (SiO 2 , CH 2

CI

2 : MeOH

NH

3

H

2 0, 90:10:1, Rf. 0.1) as solid (210 mg, yield, 90%). 1 H NMR (300 MHz,

CD

3 0D) 6 1.44 - 1.66 (m, 1 H), 1.65 - 1.94 (m, 2 H), 1.95 - 2.16 (m, 1 H), 2.20 - 2.40 20 (m, 1 H), 2.68 - 3.06 (m, 5 H), 3.37 - 3.57 (m, 1 H), 5.15 - 5.37 (m, 1 H), 6.65 - 6.89 (m, 2 H), 7.18 (d, J=9.5 Hz, 1 H), 7.55 - 7.81 (m, 2 H), 7.93 (d, J=9.2 Hz, 1 H) ppm. MS (DCI/NH 3 ): 297 (M+H)*. Example 24G 25 6-{6-{(3R)-1-Aza-bicyclo[2.2.2loct-3-yloxyl-pyridazin-3-yl}-benzothiazol-2-ylamine The product of Example 24F (150 mg, 0.5 mmol) was treated with KSCN (Aldrich, 97 mg, 1 mmol) and bromine (Aldrich, 96 mg, 0.6 mmol) in HOAc (5 mL) at ambient temperature for 0.5 h. It was then quenched with Na 2

SO

3 (aq. 10%, 1 mL) and concentrated. The title compound was purified by chromatography (SiO 2 , CH 2 Cl2 30 MeOH: NH 3

-H

2 0, 90:10:2, Rf. 0.1) as solid (170 mg, yield, 80%). 1 H NMR (300 MHz, CD 3 0D) 6 1.60-1.70 (m, 1 H), 1.72 - 1.98 (m, 2 H), 2.02 - 2.19 (m, 1 H), 2.23 -77- 2.42 (m, 1 H), 2.82 - 3.13 (m, 5 H), 3.42 - 3.68 (m, 1 H), 5.15 - 5.54 (m, 1 H), 7.26 (d, J=9.2 Hz, 1 H), 7.49 (d, J=8.5 Hz, 1 H), 7.87 (dd, J=8.6, 1.9 Hz, 1 H), 8.07 (d, J=9.5 Hz, 1 H), 8.23 (d, J=1.4 Hz, 1 H) ppm. MS (DCI/NH 3 ): 354 (M+H)*. 5 Example 24H 6-{6-[(3R)-1 -Aza-bicyclo[2.2.2loct-3-vloxyl-pyridazin-3-vl}-benzothiazol-2-ylamine tri(hydrogen chloride) The product of Example 24G (170 mg, 0.48 mmol) was treated with HCI (Aldrich, 4 M in dioxane, 0.5 mL, 2 mmol) in EtOAc (anhydrous, Aldrich, 5 mL) at 10 ambient temperature for 0.5 h to give the title compound as a yellow solid (170 mg, yield, 77%). 1 H NMR 8 1.88 - 2.29 (m, 3 H) 2.30-2.42 (m, 1 H) 2.57 - 2.75 (m, 1 H), 3.33 - 3.60 (m, 5 H), 3.99 (dd, J=14.2, 8.1 Hz, 1 H), 5.41 - 5.71 (m, 1 H), 7.50 (d, J=9.2 Hz, 1 H), 7.68 (d, J=8.8 Hz, 1 H), 8.16 (dd, J=8.5, 1.7 Hz, 1 H), 8.26 (d, J=9.2 Hz, 1 H), 8.48 (d, J=1.4 Hz, 1 H) ppm; MS (DCI/NH 3 ): 354 (M+H)*. Anal. Calculated 15 for C 18 HjqN 5 0S .3.00 HCl-1.00 H 2 0: C, 44.96; H, 5.03; N, 14.56. Found: C, 44.70; H, 5.17; N, 14.24. Example 25 (3R)-3-[6-(3-Bromo-1 H-indol-5-vl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2]octane 20 tri(hydrogen chloride) Example 25A (3R)-3-[6-(3-Bromo-1 H-indol-5-yl)-pyridazin-3-vloxyl-1 -aza-bicyclo[2.2.2]octane The product of Example 9B (160 mg, 0.5 mmol) was dissolved in MeCN (10 25 mL) and treated with HOAc (Sigma, 60 mg, 1 mmol) for 10 min. N-bromosuccinimide (Aldrich, 110 mg, 0.6 mmol) in MeCN (Aldrich, 5 mL) was slowly added over 5 min. The mixture was stirred for 1 hour at ambient temperature and concentrated under vacuum. The title compound was purified by chromatography (Si0 2 , CH 2

CI

2 : MeOH : NH 3

H

2 0, 90:10:1, Rf. 0.15) as a solid (70 30 mg, yield, 35%). 'H NMR (300 MHz, CD 3 0D) 6 1.55-1.62 (m, 1 H), 1.70 - 1.96 (m, 2 H), 2.05-2.20 (m, 1 H), 2.29 - 2.43 (m, 1 H), 2.74 - 3.13 (m, 5 H), 3.42 - 3.66 (m, 1 H, -78- 5.24 - 5.46 (m, 1 H), 7.27 (d, J=9.2 Hz, 1 H), 7.38 (s, 1 H), 7.53 (d, J=8.5 Hz, 1 H), 7.82 (dd, J=8.5, 1.7 Hz, 1 H), 8.05 (s, 1 H), 8.11 (d, J=9.5 Hz, 1 H) ppm. MS

(DCI/NH

3 ): 399 (M+H)*, 401 (M+H)*. 5 Example 25B (3R)-3-[6-(3-Bromo-1H-indol-5-yl)-pyridazin-3-vloxyl-1-aza-bicyclo[2.2.2loctane tri(hydrogen chloride) The product of Example 25A (50 mg, 0.125 mmol) was treated with HCI (Aldrich, 4 M in dioxane, 0.25 mL, 1 mmol) in EtOAc (anhydrous, 5 mL) at ambient 10 temperature for 1h to provide the title compound as yellow solid (60 mg, yield, 95%). 'H NMR (300 MHz, CD 3 0D) 8 1.89 - 2.28 (m, 3 H), 2.29 - 2.56 (m, 1 H), 2.63 - 2.80 (m, 1 H), 3.35 - 3.71 (m, 5 H), 3.81 - 4.10 (m, 1 H), 5.37 - 5.74 (m, 1 H), 7.56 (s, 1 H), 7.72 (d, J=8.5 Hz, 1 H) 7.80 (dd, J=8.5, 1.8 Hz, 1 H), 8.01 (d, J=9.5 Hz, 1 H) 8.21 (d, J=1.4 Hz, 1 H), 8.76 (d, J=9.5 Hz, 1 H) ppm; MS (DCI/NH 3 ): 399 (M+H)*, 15 401 (M+H)*. Anal. Calculated for C 19

H

1 gBrN 4 0 -3.00 HC-1.50 H 2 0: C, 42.60; H, 4.70; N, 10.46. Found: C, 42.59; H, 4.79; N, 10.09. Example 26 5-{6-[(3R)- 1 -Aza-bicyclo[2.2.2]oct-3-yloxyl-pyridazin-3-yl}-1, 3-dihydro-indol-2-one 20 bis(hydrogen chloride) Example 26A 5-(4,4,5,5-Tetramethyl-[1,3,21dioxaborolan-2-vl)-1,3-dihydro-indol-2-one 5-Bromo-1,3-dihydro-indol-2-one (Aldrich, 1.06 g, 5 mmol) was coupled with 25 bis(pinacolato)diboron (Aldrich, 1.52 g, 6 mmol) catalyzed by PdCl 2 (dppf) 2

CH

2 Cl2 (Aldrich, 82 mg, 0.1 mmol) using KOAc (Aldrich, 0.98 g, 10 mmol) as base in dioxane (anhydrous, Aldrich, 50 mL) at 80 0 C for 1Oh. After being cooled down to ambient temperature, the mixture was diluted with EtOAc (50 mL) and washed with brine (2 x 10 mL). The organic solution was then concentrated under vacuum. The 30 title compound was purified by chromatography (SiO 2 , hexane: EtOAc, 70:30, Rf. 0.5) as a solid (0.96 g, yield, 74%). 'H NMR (300 MHz, CDCI3) 6 1.24 (s, 3 H), 1.28 -79- (s, 3 H), 1.34 (s, 6 H), 3.69 (s, 2 H), 6.86 (d, J=7.8 Hz, 1 H), 7.57 - 7.78 (m, 2 H) ppm. MS (DCI/NH 3 ): 260 (M+H)*. Example 26B 5 5-{6-[(3R)- 1 -Aza-bicyclo[2.2.2loct-3-vloxyl-pyridazin-3-yll-1, 3-dihyd ro-indol-2-one The product of Example 4A (240 mg, 1 mmol) was coupled with the product of Example 26A (520 mg, 2 mmol) catalyzed by PdCl 2 (PPh 3

)

2 (Aldrich, 35 mg, 0.05 mmol) and 2-(dicyclohexylphosphino)biphenyl (Strem Chemicals, 52.5 mg, 0.15 mmol) in dioxane/EtOH/Na 2

CO

3 (aq, 1 M) (v. 1/1/1, 4.5 mL) at 130 0 C at 330 watts for 10 15 min in an EmryTM Creator microwave. The inorganic solid was filtered off with a syringe filter and the mixture was then directed purified by chromatography (SiO 2 , EtOAc: MeOH (v. 2% NH 3

.H

2 0), 50:50, Rf. 0.2) to give the title compound (240 mg, 71%). 'H NMR (300 MHz, MeOH-D 4 ) 6 1.53- 1.72 (m, 1 H), 1.73- 1.96 (m, 2 H), 2.05 - 2.22 (m, 1 H), 2.24 - 2.49 (m, 1 H), 2.83 - 3.15 (m, 5 H), 3.34 (S, 2 H), 3.47 15 3.65 (m, 1 H), 5.16 - 5.49 (m, 1 H), 7.02 (d, J=7.7 Hz, 1 H), 7.25 (d, J=9.2 Hz, 1 H), 7.73 - 7.90 (m, 2 H), 8.01 (d, J=9.2 Hz, 1 H) ppm. MS (DCI/NH 3 ): 337 (M+H)*. Example 26C 5-{6-[(3R)- 1-Aza-bicyclo[2.2.2loct-3-yloxyl-pyridazin-3-vl}-1,3-dihvdro-indol-2-one 20 bis(hydroqen chloride) The product of Example 26B (80 mg, 0.24 mmol) was treated with HCI (Aldrich, 4 M in dioxane, 0.25 mL, 1 mmol) in EtOAc (anhydrous, 5 mL) at ambient temperature for 1 h to provide the title compound as yellow solid (100 mg, yield, 100%). 1 H NMR (300 MHz, MeOH-D 4 ) 8 1.89 - 2.28 (m, 3 H), 2.29 - 2.49 (m, 1 H), 25 2.60-2.72 (m, 1 H), 3.34 - 3.63 (m, 5 H), 3.67 (s, 2 H), 3.81 - 4.10 (m, 1 H), 5.45 5.71 (m, 1 H), 7.12 (d, J=6.1 Hz, 1 H), 7.77 (d, J=9.2 Hz, 1 H), 7.82 - 7.97 (m, 1 H), 8.46 (d, J=9.5 Hz, 1 H) ppm; MS (DCI/NH 3 ): 337 (M+H)*. Anal. Calculated for

C

1 9

H

2 0

N

4 0 2 -2.00 HCI-2.00 H 2 0: C, 51.24; H, 5.88; N, 12.58. Found: C, 51.34; H, 5.75; N, 12.62. 30 Example 27 -80- 5-{6-[(3R)-1 -Oxy-1 -Aza-bicyclo[2.2.2loct-3-yloxyl-pyridazin-3-vll-1,3-dihydro-indol-2 one bis(hydrogen chloride) Example 27A 5 5-{6-[(3R)-1 -Oy-1 -Aza-bicyclo[2.2.2Ioct-3-yloxyl-pyridazin-3-yl}-1,3-dihydro-indol-2 one The product of Example 26B (100 mg, 0.30 mmol) was treated with H 2 02 (Aldrich, 30%, 0.5 mL, 1.3 mmol) in MeCN / H 2 0 (v. 4 / 1, 10 mL) at 60 0 C for 70 hours according to the procedure of Example 23. The title compound was purified by 10 chromatography (SiO 2 , EtOAc: MeOH (v. 2% NH 3

.H

2 O), 50:50, Rf. 0.1) as solid (80 mg, 76%). 1 H NMR (300 MHz, MeOH-D 4 ) 6 2.01 - 2.29 (m, 3 H), 2.37 - 2.61 (m, 2 H), 3.33 - 3.54 (m, 5 H), 3.68 (s, 2 H), 3.87 - 4.18 (m, 1 H), 5.46 - 5.77 (m, 1 H), 7.03 (d, J=8.1 Hz, 1 H), 7.31 (d, J=9.5 Hz, 1 H), 7.75 - 7.93 (m, 2 H), 8.06 (d, J=9.5 Hz, 1 H) ppm. MS (DCI/NH 3 ): 353 (M+H)*. 15 Example 27B 5-{6-[(3R)-1-Oxy-1-Aza-bicyclo[2.2.2loct-3-vloxyl-pyridazin-3-vl}-1,3-dihydro-indol-2 one bis(hydrogen chloride) The product of Example 27A (80 mg, 0.23 mmol) was treated with HCI 20 (Aldrich, 4M in dioxane, 0.25 mL, 1 mmol) in i-PrOH (5 mL) at ambient temperature for 1h to provide the title compound as yellow solid (90 mg, yield, 93%). 1 H NMR S 2.10 - 2.50 (m, 3 H), 2.54 - 2.81 (m, 2 H), 3.35 (s, 2 H), 3.71 - 3.94 (m, 4 H), 4.02 (d, J=13.2 Hz, 1 H), 4.30 - 4.58 (m, 1 H), 5.51 - 5.86 (m, 1 H), 7.18 (d, J=8.9 Hz, 1 H), 7.84 - 8.00 (m, 2 H), 7.99 (d, J=9.2 Hz, 1 H), 8.63 (d, J=9.2 Hz, 1 H) ppm; MS 25 (DCI/NH 3 ): 353 (M+H)*. Anal. Calculated for C 1

H

20

N

4 0 3 -2.00 HCl-1.65 H 2 0: C, 50.15; H, 5.60; N, 12.31. Found: C, 49.77; H, 5.29; N, 12.03. Example 28 5-{6-[(3R)-1 -Aza-bicyclo[2.2.2loct-3-yloxyl-pyridazin-3-vll-1,3-dihydro-benzoimidazol 30 2-one trifluroacetate -81- Example 28A (4-Bromo-2-nitro-phenyl)-carbamic acid tert-butyl ester 4-Bromo-2-nitro-phenylamine (Aldrich, 10.8 g, 50 mmol) was treated with di(tert-butyl) dicarbonate (Aldrich, 11.99 g, 55 mmol) in THF (Aldrich, 100 mL) at 5 refluxing for 6 hours. It was then concentrated and the title compound was purified by recrystallization in EtOH as white solid (12.8 g, yield, 81%). 'H NMR (300 MHz, MeOH-D 4 ) 6 1.40 (S, 9 H), 7.21 (d, J=8.5 Hz, 1 H), 7.76 (dd, J=8.4, 2.3 Hz, 1 H), 8.21 (d, J=2.1 Hz, 1 H) ppm. MS (DCI/NH 3 ): 334 (M+H)*, 336 (M+H)*. 10 Example 28B [2-Nitro-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyll-carbamic acid tert butyl ester The product of Example 28A (10.05 g, 30 mmol) was coupled with with bis(pinacolato)diboron (Aldrich, 9.14 g, 36 mmol) under the catalysis of 15 PdCl 2 (dppf) 2

-CH

2

CI

2 (Aldrich, 490 mg, 0.6 mmol) with KOAc (Aldrich, 6.0 g, 60 mmol) in dioxane (anhydrous, Aldrich, 150 mL) at 80 0 C for 10 hours according to the procedure of Example 26A. The title compound was purified by chromatography (SiO 2 , hexane: EtOAc, 70:30, Rf. 0.5) as solid (9.0 g, yield, 83%). 'H NMR (300 MHz, CDCl 3 ) 6 1.37 (s, 9 H), 1.38 (s, 12 H), 7.99 (d, J=1.4 Hz, 1 H), 8.02 (d, J=1.4 20 Hz, 1 H), 8.45 (d, J=1.4 Hz, 1 H) ppm. MS (DCI/NH 3 ): 382 (M+NH4)*. Example 28C {4-f6-[(3R)-1 -Aza-bicyclo[2.2.2loct-3-vloxyl-pyridazin-3-vl}-2-nitro-phenvll-carbamic acid tert-butyl ester 25 The product of Example 9A (240 mg, 1 mmol) was coupled with the product of Example 28B (0.72, 2 mmol) under the catalysis of Pd 2 (dba) 3 (24 mg, 0.025 mmol) and (tBu 3

P)

2 Pd (26 mg, 0.05 mmol) with CsF (Strem Chemicals, 228 mg, 1.5 mmol) in dioxane (8 mL) and DMF (Aldrich, 1 mL) at 800C under N 2 for 16 hours according to the procedure of Example 20B. The title compound was purified by 30 chromatography (SiO 2 , EtOAc: MeOH (v. 2% NH 3

.H

2 0), 50:50, Rf. 0.3) as yellow solid (350 mg, 79%). 'H NMR (300 MHz, MeOH-D 4 ) 6 1.40 (s, 9 H), 1.51 - 1.70 (m, -82- 1 H), 1.70 - 1.98 (m, 2 H), 2.00 - 2.23 (m, 1 H), 2.37 - 2.51 (m, 1 H), 2.71 - 3.18 (m, 5 H), 3.47 - 3.69 (m, 1 H), 5.33 - 5.49 (m, 1 H), 7.30 (d, J=9.2 Hz, 1 H), 7.54 (d, J=8.5 Hz, 1 H), 7.62 (s, 1 H), 8.14 (d, J=9.5 Hz, 1 H), 8.37 (dd, J=8.1, 2.0 Hz, 1 H), 8.80 (d, J=2.0 Hz, 1 H) ppm. MS (DCI/NH 3 ): 442 (M+H)*. 5 Example 28D 4-{6-[(3R)-1 -Aza-bicyclo[2.2.2loct-3-vloxyl-pyridazin-3-yl}-2-nitro-phenylamine The product of Example 28C (350 mg, 0.79 mmol) was treated with HCI (Aldrich, 4 M in dioxane, 2 mL, 8 mmol) in EtOH (5 mL) at ambient temperature for 1 10 h. The mixture was concentrated and the title compound was purified by chromatography (SiO 2 , EtOAc: MeOH (v. 2% NH 3

.H

2 0), 50:50, Rf. 0.1) as white solid (250 mg, 93%). 1 H NMR (300 MHz, MeOH-D 4 ) 6 1.54 - 1.66 (m, 1 H), 1.72 2.02 (m, 2 H), 2.07 - 2.24 (m, 1 H), 2.35 - 2.57 (m, 1 H), 2.79 - 3.18 (m, 5 H), 3.48 3.69 (m, 1 H), 5.27 - 5.47 (m, 1 H), 7.10 (d, J=8.8 Hz, 1 H), 7.22 (d, J=9.5 Hz, 1 H), 15 7.66 (s, 1 H), 7.98 (d, J=9.2 Hz, 1 H), 8.08 (dd, J=9.0, 2.2 Hz, 1 H), 8.68 (d, J=2.4 Hz, 1 H) ppm. MS (DCI/NH 3 ): 342 (M+H)*. Example 28E 4-{6-[(3R)-1 -Aza-bicyclo[2.2.2loct-3-vloxyl-pyridazin-3-yll-benzene-1,2-diamine 20 The product of Example 28D (200 mg, 0.59 mmol) was hydrogenated under the catalysis of Pd/C (Aldrich, lOwt.%, 50 mg) in EtOH (10 mL) under hydrogen at ambient temperature for 10 h. After the reaction went to completion, the catalyst was removed through a short column of diatomaceous earth (- 2 g) and the filtrate was washed with EtOH (2 x 5 mL). The ethanol solution was concentrated to give the title 25 compound (180 mg, yield, 98%). 'H NMR (500 MHz, CD 3 -OD) 5 1.58 - 1.73 (m, 1 H), 1.76 - 2.00 (m, 2 H), 2.06 - 2.27 (m, 1 H), 2.29 - 2.47 (m, 1 H), 2.81 - 3.20 (m, 5 H), 3.52 - 3.68 (m, 1 H), 5.11 - 5.57 (m, 1 H), 6.78 (d, J=8.2 Hz, 1 H), 7.12 - 7.26 (m, 2 H), 7.32 (d, J=2.1 Hz, 1 H), 7.92 (d, J=9.2 Hz, 1 H) ppm. MS (DCI/NH 3 ): 312 (M+H)*. -83- Example 28F 5-{6-[(3R)-1-Aza-bicyclo[2.2.2loct-3-yloxyl-pyridazin-3-vl}-1,3-dihydro-benzoimidazol 2-one trifluroacetate The product of Example 28E (62 mg, 0.2 mmol) was treated with 1,1' 5 carbonyldiimidazole (Aldrich, 50 mg, 0.31 mmol) in THF/DMF (v. 1:1, 5 mL) at ambient temperature for 1Oh. It was then concentrated. The title product was purified by preparative HPLC (Xterra T M , column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA), (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (20.0 mg, 22%). 1 H NMR (500 MHz, CD 3 -OD) 6 10 1.94 - 2.33 (m, 3 H), 2.30 - 2.48 (m, 1 H), 2.65 - 2.79 (m, 1 H), 3.38 - 3.70 (m, 6 H), 3.94 - 4.06 (m, 1 H), 5.41 - 5.73 (m, 1 H), 7.31 (d, J=7.6 Hz, 1 H), 7.62 - 7.78 (m, 2 H), 8.00 (d, J=7.0 Hz, 1 H), 8.65 (d, J=7.3 Hz, 1 H) ppm; MS (DCI/NH 3 ): 338 (M+H)*. Anal. Calculated for C 1 8

H

19

N

5 0 2 1.15 CF 3

CO

2 H -2.30 H 2 0: C, 47.81; H, 4.89; N, 13.73. Found: C, 47.69; H, 5.27; N, 14.09. 15 Example 29 (R)-3-[6-( 1H-Benzoimidazol-5-yl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2loctane Example 29A 20 (R)-N-f4-[6-(1 -Aza-bicyclo[2.2.2loct-3-vloxv)-pvridazin-3-yIl-phenvl}-acetamide The product of Example 9A (182 mg, 0.76 mmol), N-[4-(4,4,5,5-tetramethyl [1,3,2]dioxaborolan-2-yl)-phenyl]-acetamide (Aldrich, 500 mg, 1.9 mmol), dichlorobis(triphenylphosphine)palladium (11) (Aldrich, 53 mg, 0.076 mmol) and 2 (dicyclohexylphosphino)biphenyl (Strem Chemicals, 6.5 mg, 0.019 mmol) were 25 combined with 1 mL each of ethanol, p-dioxane, and 1 M aq. sodium carbonate. The mixture was heated in a sealed tube to 150 *C at 330 watts for 10 min in an Emry TM Creator microwave. The mixture was cooled to room temperature, filtered through Celite*, and concentrated onto silica. The product was purified by column chromatography (SiO 2 , 5% methanol containing 1% NH 4 0H -CH 2

CI

2 ) to provide the 30 title compound (203 mg, 79%).

1 H NMR (300 MHz, CD 3 0D) 8 1.96 (m, 1 H), 2.09 (m, 1 H), 2.16 (m, 1 H), 2.16 (s, 3 H), 2.38 (m, 1 H), 2.64 (td, J=6.5, 3.6 Hz, 1 H), 3.33 -84- 3.53 (m, 6 H), 3.97 (dd, J=13.9, 8.1 Hz, 1 H), 5.54 (m, 1 H), 7.32 (d, J=9.4 Hz, 1 H), 7.69 - 7.78 (m, 2 H), 7.91 - 7.98 (m, 2 H), 8.11 (d, J=9.3 Hz, 1 H) ppm; MS (DCI/NH3): m/z 339 (M+H)*. 5 Example 29B 4-6-[(3R)-1 -Aza-bicyclof2.2.2loct-3-vloxyl-pyridazin-3-vl}-2-nitro-phenvlamine trifluoroacetate To an ice-cold solution of Example 29A (160 mg, 0.47 mmol) in conc. sulfuric acid (5 mL) was added 90% nitric acid (0.020 mL, 0.47 mmol). After 2 h at 4 0 C, the 10 mixture was poured over ice and neutralized with ice-cold NaOH (1 N aq.). The mixture was concentrated and the residue was dissolved in MeOH and filtered to give a crude red solid. The product was purified by preparative RP HPLC (Symmetry@ C-8, 7 pm, 40 x 100 mm; 10-90% MeCN / H 2 0 with 0.2% v. TFA) to give the title compound (54 mg, 0.11 mmol, 23%). 'H NMR (400 MHz, CD 3 0D) 8 15 1.97 (m, 1 H), 2.03 - 2.23 (m, 2 H), 2.39 (m, 1 H), 2.65 (td, J=6.5, 3.6 Hz, 1 H), 3.35 3.47 (m, 4 H), 3.49 (m, 1 H), 3.85 (m, 1 H), 3.97 (dd, J=14.0, 8.4 Hz, 1 H), 5.54 (m, 1 H), 7.12 (d, J=8.9 Hz, 1 H), 7.33 (d, J=9.2 Hz, 1 H), 8.04 (dd, J=8.9, 2.1 Hz, 1 H), 8.11 (d, J=9.2 Hz, 1 H), 8.71 (d, J=2.1 Hz, 1 H) ppm. MS (ESI): m/z 342 (M+H)*. 20 Example 29C (R)-3-[6-( H-Benzoimidazol-5-y)-pyridazin-3-vloxyl-1 -aza-bicyclo[2.2.2loctane The product of Example 29B (29 mg, 0.064 mmol) was dissolved in 2.0 mL of methanol and 6 mg of Pd(OH) 2 /C (Aldrich, 10 wt%) was added. The mixture was stirred under 50 psi of H 2 for 30 min. The solution was filtered through a nylon 25 membrane and concentrated. The residue was dissolved in DMF (0.25 mL) and treated with excess triethylorthoformate (0.1 mL). The solution was heated at 80 *C for 2 h, then cooled down to ambient temperature and stirred for 4 h. The title product was purified by preparative HPLC (Xterra T M , column, Xterra RP-18 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10) (v. 40/60 to 30 70/30 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (13 mg, 0.04 mmol, 63%). 1 H NMR (300 MHz, CD 3 0D) 8 1.57 (m, 1 H), 1.73 - 1.94 (m, 2 H), 2.08 (m, 1 -85- H), 2.34 (td, J=6.4, 3.6 Hz, 1 H), 2.80 - 3.03 (m, 6 H), 3.50 (ddd, J=14.5, 8.1, 1.5 Hz, 1 H), 5.32 (m, 1 H), 7.28 (d, J=9.2 Hz, 1 H), 7.74 (d, J=8.5 Hz, 1 H), 7.91 (d, J=8.5 Hz, 1 H), 8.11 (d, J=9.2 Hz, 1 H), 8.22 (s, 1 H), 8.25 (s, 1 H) ppm; MS (DCI/NH 3 ): m/z 322 (M+H)*. 5 Example 30 (S)-3-[6-(1 H-Indol-5-vl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.21octane Fumarate Example 30A 10 (S)-3-(6-Chloro-pyridazin-3-yioxy)-1 -aza-bicyclo[2.2.2]octane The product of Example 13D (254 mg, 2 mmol) was coupled with 3,6 dichloropyridazine (Aldrich, 596 mg, 4 mmol) according to the procedure of Example 7A. The title compound was purified by flash chromatography (SiO 2 , CH 2

CI

2 : MeOH : NH 3

-H

2 0, 90:10:2, Rf. 0.30) as solid (346 mg, 72%). 1 H NMR (300 MHz, MeOH-D 4 ) 15 6 1.47 - 1.63 (m, J=12.9 Hz, 1 H), 1.65 - 1.92 (m, 2 H), 1.94 - 2.10 (m, J=5.9, 3.6 Hz, 1 H), 2.22 - 2.32 (m, J=2.7 Hz, 1 H), 2.72 - 3.02 (m, 5 H), 3.36 - 3.49 (m, 1 H), 5.17 5.28 (m, 1 H), 7.23 (d, J=9.2 Hz, 1 H), 7.65 (d, J=9.5 Hz, 1 H) ppm. MS (DCI/NH 3 ) m/z 240 (M+H)*, 242 (M+H)*. 20 Example 30B (S)-3-[6-(1 H-Indol-5-vl)-pyridazin-3-yloxyl-1-aza-bicyclo[2.2.2loctane The product of Example 30A (270 mg, 1.1 mmol) was coupled with 5 indolylboronic acid (215 mg, 1.4 mmol) according to the procedure of Example 20B. The title compound was purified by preparative HPLC (Xterra

TM

, column, Xterra RP 25 18 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, PH=10) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (200 mg, 57%). 'H NMR (300 MHz, MeOH-D 4 ) 6 1.49 - 1.63 (m, 1 H), 1.67 - 1.92 (m, 2 H), 1.99 - 2.14 (m, 1 H), 2.28 - 2.36 (m, 1 H), 2.76 - 3.04 (m, 5 H), 3.48 (ddd, J=14.7, 8.2, 1.9 Hz, 1 H), 5.24 - 5.34 (m, 1 H), 6.56 (d, J=4.1 Hz, 1 H), 7.24 (d, J=9.5 Hz, 1 30 H), 7.30 (d, J=3.4 Hz, 1 H), 7.50 (d, J=8.5 Hz, 1 H), 7.73 (dd, J=8.6, 1.9 Hz, 1 H) ,8.07 (d, J=9.5 Hz, 1 H), 8.13 (s, 1 H) ppm. MS (DCI/NH 3 ) m/z 321 (M+H)*. -86- Example 30C (S)-3-[6-( 1H-Indol-5-yl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2loctane fumarate The product of Example 30B (200 mg, 0.625 mmol) was treated with fumaric 5 acid (Aldrich, 73 mg, 0.63 mmol) in EtOAc/MeOH (v.10:1, 10 mL) at ambient temperature for 10 hours to give title compound (240.2 mg, 85%). 1 H NMR (300 MHz, MeOH-D 4 ) 6 1.87 - 2.22 (m, 3 H), 2.31 - 2.45 (m, 1 H), 2.60 - 2.67 (m, 1 H), 3.30 - 3.50 (m, 5 H), 3.89 - 4.00 (m, 1 H), 5.49 - 5.57 (m, 1 H), 6.57 (d, J=3.1 Hz, 1 H), 6.68 (s, 2 H), 7.28 - 7.35 (m, 2 H), 7.52 (d, J=8.5 Hz, 1 H), 7.74 (dd, J=8.6, 1.9 10 Hz, 1 H), 8.11 - 8.19 (m, J=9.5 Hz, 2 H) ppm. MS (DCI/NH 3 ) m/z 321 (M+H)*. Anal. Calculated for C 1

H

20

N

4 0-1.0 C 4 0 4

H

4 -0.50 H 2 0: C, 62.01; H, 5.66; N, 12.58. Found: C, 61.79; H, 5.46; N, 12.43. Example 31 15 (R)-3-[5-( H-Indol-5-vl)-pyridin-2-yloxyl-1 -aza-bicyclo[2.2.2loctane trifluoroacetate Example 31A (R)-3-(5-Bromo-pyridin-2-yloxy)-1 -aza-bicyclo[2.2.2loctane The product of Example 4A (1.27 g, 10 mmol) was coupled with 5-bromo-2 20 chloro-pyridine (Aldrich, 1.54 g, 8 mmol) according to the procedure of Example 7A. The title compound was purified by column chromatography (Si0 2 , CH 2 Cl 2 : MeOH

NH

3

-H

2 0, 90:10:1, Rf. 0.2) as a solid (2.0 g, yield, 88%). 'H NMR (MeOH-d 4 , 300 MHz) 1.49 - 1.64 (m, 1 H), 1.66 - 1.91 (m, 2 H), 1.97 - 2.11 (m, 1 H), 2.17 - 2.26 (m, 1 H), 2.77 - 3.05 (m, 5 H), 3.36 - 3.47 (m, 1 H), 5.02 - 5.10 (m, 1 H), 6.77 (d, J=8.8 25 Hz, 1 H), 7.78 (dd, J=8.8, 2.7 Hz, 1 H), 8.16 (t, J=2.5 Hz, 1 H) ppm. MS (DCI/NH 3 ) m/z 283 (M+H)*, 285(M+H)*. Example 31B (R)-3-[5-( 1H-Indol-5-yl)-pyridin-2-vloxyl-1 -aza-bicyclo[2.2.2loctane trifluoroacetate 30 The product of Example 31A (140 mg, 0.5 mmol) was coupled with 5 indolylboronic acid (Ryscor Science, 161 mg, 1.0 mmol) according to the procedure -87of Example 29A. The title compound was preparative HPLC (Xterra T M , column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (with 0.2% v. TFA), (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (72.9 mg, 32%). 1 H NMR (MeOH-d 4 , 300 MHz) 1.86 - 2.22 (m, 3 H), 2.31 - 2.46 (m, 1 H), 5 2.52 - 2.63 (m, 1 H), 3.29 - 3.50 (m, 5 H), 3.85 - 3.97 (m, 1 H), 5.34 - 5.42 (m, 1 H), 6.49 (d, J=2.4 Hz, 1 H), 6.93 (d, J=8.5 Hz, 1 H), 7.24 - 7.35 (m, 2 H), 7.46 (d, J=8.5 Hz, 1 H), 7.74 (d, J=1.7 Hz, 1 H), 8.00 (dd, J=8.6, 2.5 Hz, 1 H), 8.38 (d, J=2.7 Hz, 1 H) ppm. MS (DCI/NH 3 ) m/z 320(M+H)*. Anal. Calculated for C 2 0H 2 1N 3 0-1.14

CF

3

CO

2 H: C, 59.55; H, 4.97; N, 9.35. Found: C, 59.59; H, 4.99; N, 9.03. 10 Example 32 (3R)-3-[5-(1H-Indol-4-yl)-pyrimidin-2-vloxyl-1-aza-bicyclo[2.2.2loctane 1-oxide The product of Example 12A (10 mg, 0.03 mol) was oxidized with H 2 0 2 (Aldrich, aq., 30%) according to the procedure of Example 23. The title compound 15 was purified by chromatography [Si0 2 , CH 2 Cl 2 : MeOH (v. 5% NH 3

.H

2 0), 90: 10]. 1 H NMR (300 MHz, CD 3 0D) 8 2.01 - 2.32 (m, 3 H), 2.42 - 2.64 (m, 2 H), 3.41 - 3.70 (m, 5H), 3.91 - 4.24 (m, 1 H), 5.39 - 5.59 (m, 1 H), 6.55 (d, J=4.0 Hz, 1 H), 7.12 (d, J=8.0 Hz, 1 H), 7.23 (t, J=8.0 Hz, 1 H), 7.36 (d, J=3.0 Hz, 1 H), 7.47 (d, J=8.0 Hz, 1 H), 8.96 (s, 2 H) ppm. 20 Example 33 (3R)-3-(5-Benzooxazol-5-yl-pyrimidin-2-yloxy)-1 -aza-bicyclof2.2.2loctane bis(hydrogen chloride) 25 Example 33A 1 -Benzyloxy-4-bromo-2-nitro-benzene 4-Bromo-2-nitro-phenol (Aldrich, 2.18 g, 10 mmol) was treated with K 2 CO3 (Aldrich, 2.76 g, 20 mmol) in DMF (Aldrich, 100 mL) at ambient temperature for 20 min. Benzyl chloride (Aldrich, 1.52 g, 12 mmol) was added. The mixture was stirred 30 at 100*C for 6 h. It was then poured into ice/water (200 mL) and stirred at ambient temperature for 10 hours. The white solid was filtered and dried to give the title -88compound (3.0 g, yield, 100%). 1 H NMR (300 MHz, CDCl 3 ) 6 5.23 (s, 2 H), 7.01 (d, J=9.2 Hz, 1 H), 7.31 - 7.49 (m, 5 H), 7.58 (dd, J=9.0, 2.5 Hz, 1 H), 7.98 (d, J=2.7 Hz, 1 H) ppm. MS (DCI/NH 3 ): 325 (M+H)*, 327 (M+H)*. 5 Example 33B [2-Nitro-4-(4,4,5,5-tetramethyl-[1,3,21dioxaborolan-2-yl)-phenyll-carbamic acid tert butyl ester The product of Example 33A (3.0 g, 10 mmol) was coupled with bis(pinacolato)diboron (Aldrich, 3.04 g, 12 mmol) according to the procedure of 10 Example 28B. The title compound was purified by chromatography (SiO 2 , hexane: EtOAc, 70:30, Rf. 0.5) as a solid (3.05 g, yield, 86%). 1 H NMR (300 MHz, MEOH-D 4 ) 6 1.34 (s, 12 H), 5.30 (s, 2 H), 7.27 - 7.43 (m, 4 H), 7.42 - 7.51 (m, 2 H), 7.89 (dd, J=8.3, 1.5 Hz, 1 H), 8.09 (d, J=1.7 Hz, 1 H) ppm. MS (DCI/NH 3 ): 373 (M+NH 4 )*. 15 Example 33C (3R)-3-[5-(4-Benzyloxy-3-nitro-phenyl)-pyrimidin-2-yloxyl-1 -aza-bicyclo[2.2.2loctane The product of Example 1 1A (1.42 g, 5 mmol) was coupled with the product of Example 33B (2.50 g, 7.0 mmol) according to the procedure of Example 20B. The title compound was purified by chromatography (SiO 2 , EtOAc: MeOH (v. 2% 20 NH 3

.H

2 0), 50:50, Rf. 0.3) as solid (1.75 g, 81%). 'H NMR (300 MHz, MeOH-D 4 ) 6 1.46 - 1.61 (m, 1 H), 1.63 - 1.92 (m, 2 H), 1.97 - 2.15 (m, 1 H), 2.17 - 2.33 (m, 1 H), 2.69 - 3.04 (m, 5 H), 3.35 - 3.49 (m, 1 H), 5.11 - 5.22 (m, 1 H), 5.34 (s, 2 H), 7.25 7.55 (m, 5 H), 7.85 (dd, J=8.8, 2.4 Hz, 1 H), 8.13 (d, J=2.0 Hz, 1 H), 8.63 (s, 1 H), 8.82 (s, 2 H) ppm. MS (DCI/NH 3 ): 433 (M+H)*. 25 Example 33D 2-Amino-4-{2-[(3R)-1 -aza-bicycloi2.2.2loct-3-vloxyl-pyrimidin-5-vl}-phenol The product of Example 33C (380 mg, 0.88) was hydrogenated under the catalysis of Pd/C (Aldrich, 10 wt. %, 100 mg) according to the procedure of Example 30 28E. The title compound was obtained as yellow solid (220 mg, yield, 92%). 'H NMR (300 MHz, CD 3 0D) 8 1.47 - 1.93 (m, 3 H), 1.95 - 2.35 (m, 2 H) 2.70 - 3.05 (m, 5 H), -89- 3.33 - 3.48 (m, 1 H), 5.04 - 5.30 (m, J=8.8 Hz, 1 H), 6.72 - 6.88 (m, 2 H), 6.98 (d, J=1.7 Hz, 1 H), 8.70 (s, 2 H)ppm. MS (DCI/NH 3 ): 313 (M+H)*. Example 33E 5 (3R)-3-(5-Benzooxazol-5-yl-pyrimidin-2-yloxy)-1 -aza-bicyclo[2.2.2loctane The product of Example 33D (62 mg, 0.2 mmol) was treated with triethyl orthoformate (Aldrich, 0.5 mL) in DMF (1 mL) at 100*C for 1Oh. It was then concentrated. The title product was purified by preparative HPLC (XterraTM, column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, 10 pH=10) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (50.0 mg, 78%). 'H NMR (300 MHz, CD 3 -OD) 8 1.46 - 1.64 (m, 1 H), 1.64 - 1.93 (m, 2 H), 2.00 - 2.19 (m, 1 H), 2.19 - 2.39 (m, 1 H), 2.67 - 3.13 (m, 5 H), 3.36 - 3.51 (m, 1 H), 5.09 - 5.38 (m, 1 H), 7.72 (dd, J=8.5, 2.0 Hz, 1 H), 7.81 (d, J=8.9 Hz, 1 H), 8.03 (d, J=1.7 Hz, 1 H), 8.53 (s, 1 H), 8.87 (s, 2 H) ppm; MS (DCI/NH 3 ): 323 (M+H)*. 15 Example 33F (3R)-3-(5-Benzooxazol-5-vl-pvrimidin-2-yloxy)-1-aza-bicvclo[2.2.2loctane bis(hydrogen chloride) The product of Example 33E (50 mg, 0.15 mmol) was treated with HCI 20 (Aldrich, 4M in dioxane, 0.50 mL, 2.0 mmol) in EtOAc (5 mL) at ambient temperature for 1 hour to afford the title compound as yellow solid (55.0 mg, 93%). 'H NMR (300 MHz, CD 3 -OD) 8 1.83 - 2.28 (m, 3 H), 2.30 - 2.50 (m, 1 H), 2.58 - 2.75 (m, 1 H), 3.34 - 3.51 (m, 5 H), 3.84 - 3.97 (m, 1 H), 5.33 - 5.52 (m, 1 H), 7.15 (d, J=8.5 Hz, 1 H), 7.51 - 7.67 (m, 1 H), 7.80 (s, 1 H), 8.09 (s, 1 H), 8.81 (s, 2 H) ppm; MS (DCI/NH 3 ): 25 323 (M+H)*. Anal. Calculated for C 18

H

18

N

4 0 2 -2.38 HCI -2.60 H 2 0: C, 47.41; H, 5.65; N, 12.29. Found: C, 47.33; H, 5.25; N, 11.92. Example 34 (3R)-3-[5-(2-Methyl-benzooxazol-5-vl)-pyrimidin-2-yloxyl-1 -aza-bicyclo[2.2.21octane 30 hydrogen chloride -90- Example 34A (3R)-3-[5-(2-Methyl-benzooxazol-5-yl)-pyrimidin-2-yloxyl-1 -aza-bicyclo[2.2.21octane The product of Example 33D (62 mg, 0.2 mmol) was treated with triethyl orthoacetate (Aldrich, 0.5 mL) in DMF (1 mL) at 100 0 C for 10h. It was then 5 concentrated. The title product was purified by preparative HPLC (XterraTM, column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10) (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (20.0 mg, 30%). 'H NMR (500 MHz, CD 3 0D) 8 1.51 - 1.64 (m, 1 H), 1.66 - 1.77 (m, 1 H), 1.78 - 1.91 (m, 1 H), 2.02 - 2.16 (m, 1 H), 2.19 - 2.36 (m, 1 H), 2.67 (s, 3 H), 2.74 10 - 3.07 (m, 5 H), 3.37 - 3.48 (m, 1 H), 5.07 - 5.39 (m, 1 H), 7.62 (dd, J=8.5, 1.3 Hz, 1 H), 7.68 (d, J=8.3 Hz, 1 H),7.87 (d, J=1.2 Hz, 1 H), 8.79 - 8.93 (s, 2 H) ppm; MS

(DCI/NH

3 ): 327 (M+H)*. Example 34B 15 (3R)-3-[5-(2-Methyl-benzooxazol-5-yl)-pyrimidin-2-vloxyl-1 -aza-bicyclo[2.2.21octane hydrogen chloride The product of Example 34A (20 mg, 0.06 mmol) was treated with HCI (Aldrich, 4M in dioxane, 0.25 mL, 1.0 mmol) in EtOAc (3 mL) at ambient temperature for 1 hour to afford the title compound as yellow solid (20.0 mg, 92%). 'H NMR (500 20 MHz, CD 3 0D) 8 1.92 - 2.25 (m, 3 H), 2.33 - 2.47 (m, 1 H), 2.59 - 2.65 (m, 1 H), 2.65 - 2.71 (s, 3 H), 3.33 - 3.54 (m, 5 H), 3.87 - 4.00 (m, 1 H), 5.34 - 5.54 (m, 1 H), 7.63 (d, J= 8.5 Hz, 1 H), 7.70 (d, J= 8.5 Hz, 1 H), 7.88 (s, 1 H), 8.90 (s, 2 H) ppm; MS

(DCI/NH

3 ): 327 (M+H)*. Anal. Calculated for C 19

H

20

N

4 0 2 -1.20 HCI -1.50 H 2 0: C, 56.39; H, 5.60; N, 13.45. Found: C, 56.05; H, 5.99; N, 13.76. 25 Example 35 (3R)-3-[5-(2-Ethyl-benzooxazol-5-yl)-pyrimidin-2-yloxyl-1 -aza-bicyclo[2.2.2loctane bis(hydrogen chloride) 30 -91- Example 35A (3R)-3-[5-(2-Ethyl-benzooxazol-5-yl)-pyrimidin-2-yloxyl-1 -aza-bicyclo[2.2.2loctane The product of Example 33D (62 mg, 0.2 mmol) was treated with triethyl orthopropionate (Aldrich, 0.5 mL) in DMF (1 mL) at 100*C for 1Oh. It was then 5 concentrated. The title.product was purified by preparative HPLC (XterraTM, column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10), (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (20.0 mg, 30%). 1 H NMR (500 MHz, CD 3 0D) 8 1.45 (t, J=7.6 Hz, 3 H), 1.49 - 1.64 (m, 1 H), 1.66 - 1.78 (m, 1 H), 1.79 - 1.94 (m, 1 H), 2.04 - 2.16 (m, 1 H), 2.21 - 2.36 10 (m, 1 H), 2.72 - 3.11 (m, 7 H), 3.37 - 3.53 (m, 1 H), 5.07 - 5.31 (m, 1 H), 7.62 (dd, J= 8.5, 1.7 Hz, 1 H) 7.69 (d, J= 8.6 Hz, 1 H), 7.89 (d, J=1.2 Hz, 1 H), 8.82 - 8.90 (m, 2 H) ppm; MS (DCI/NH 3 ): 351 (M+H)*. Example 35B 15 (3R)-3-[5-(2-Methyl-benzooxazol-5-l)-pyrimidin-2-vloxyl-1 -aza-bicyclo[2.2.21octane bis(hydrogen chloride) The product of Example 35A (20 mg, 0.06 mmol) was treated with HCI (Aldrich, 4M in dioxane, 0.25 mL, 1.0 mmol) in EtOAc (3 mL) at ambient temperature for 1 hour to afford the title compound as yellow solid (15.0 mg, 92%). 1 H NMR (500 20 MHz, CD 3 -OD) 8 1.46 (t, J=7.6 Hz, 3 H), 1.89 - 2.25 (m, 3 H), 2.28 - 2.52 (m, 1 H), 2.54 - 2.72 (m, 1 H), 3.02 (q, J=7.6 Hz, 2 H), 3.22 - 3.56 (m, 5 H), 3.92 (dd, J=13.6, 8.7 Hz, 1 H), 4.99 - 5.63 (m, 1 H), 7.63 (d, J=8.5 Hz, 1 H), 7.71 (d, J=8.5 Hz, 1 H), 7.90 (s, 1 H), 8.90 (s, 2 H) ppm; MS (DCI/NH 3 ): 351 (M+H)*. Anal. Calculated for

C

20

H

2 2

N

4 0 2 -2.00 HCI: C, 56.74; H, 5.71; N, 13.23. Found: C, 56.82; H, 5.69; N, 25 13.13. Example 36 (3R)-3-[5-(2-Phenyl-benzooxazol-5-l)-pyrimidin-2-yloxyl-1-aza-bicyclo[2.2.2loctane bis(hydrogen chloride) 30 -92- Example 36A (3R)-3-[5-(2-Phenyl-benzooxazol-5-yl)-pyrimidin-2-yloxyl-1-aza-bicyclo[2.2.2loctane The product of Example 33D (62 mg, 0.2 mmol) was treated with triethyl orthobenzoate (Aldrich, 0.5 mL) in DMF (1 mL) at 100 0 C for 10h. It was then 5 concentrated. The title product was purified by preparative HPLC (XterraTM, column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10), (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (40.0 mg, 50%). 'H NMR (500 MHz, CD 3 0D) 3 1.52 - 1.64 (m, 1 H), 1.68 - 1.80 (m, 1 H), 1.80 - 1.92 (m, 1 H), 2.06 - 2.18 (m, 1 H), 2.25 - 2.31 (m, 1 H), 2.75 - 3.10 (m, 5 10 H), 3.39 - 3.49 (m, 1 H), 5.14 - 5.27 (m, 1 H), 7.55 - 7.66 (m, 3 H), 7.69 (dd, J=8.5, 1.8 Hz, 1 H), 7.81 (d, J=8.2 Hz, 1 H), 8.00 (d, J=1.5 Hz, 1 H), 8.27 (dd, J=8.1, 1.7 Hz, 2 H), 8.89 (s, 2H) ppm; MS (DCI/NH 3 ): 399 (M+H)*. Example 36B 15 (3R)-3-[5-(2-Phenyl-benzooxazol-5-y)-pyrimidin-2-yloxvl-1 -aza-bicyclo[2.2.21octane bis(hydrogen chloride) The product of Example 36A (40 mg, 0.10 mmol) was treated with HCI (Aldrich, 4M in dioxane, 0.25 mL, 1.0 mmol) in EtOAc (3 mL) at ambient temperature for 1 hour to afford the title compound as yellow solid (20.0 mg, 92%). 'H NMR (500 20 MHz, CD 3 0D) 8 1.93 - 2.23 (m, 3 H), 2.33 - 2.48 (m, 1 H), 2.60 - 2.71 (m, 1 H), 3.34 3.57 (m, 5 H), 3.90 - 3.99 (m, 1 H), 5.35 - 5.61 (m, 1 H), 7.54 - 7.68 (m, 3 H), 7.72 (dd, J=8.4, 1.7 Hz, 1 H), 7.84 (d, J=8.5 Hz, 1 H), 8.03 (d, J=1.2 Hz, 1 H), 8.21 - 8.37 (m, 2 H), 8.98 (s, 2 H) ppm; MS (DCI/NH 3 ): 399 (M+H)*. Anal. Calculated for

C

24

H

22

N

4 0 2 1.40 HCI -1.50 H 2 0: C, 60.49; H, 5.58. Found: C, 60.12; H, 5.72. 25 Example 37 (R)-5-[2-(1-Aza-bicyclo[2.2.2]oct-3-vloxy)-pyrimidin-5-yll-3H-benzooxazol-2-one bis(hydrochloride) 30 Example 37A (R)-5-[2-( 1-Aza-bicyclof2.2.2loct-3-vloxy)-pyrimidin-5-yll-3H-benzooxazol-2-one -93- The product of Example 33D (62 mg, 0.2 mmol) was treated with 1,1' carbonyldiimidazole (Aldrich, 50 mg, 0.31 mmol) in THF/DMF (v. 1:1, 5 mL) at ambient temperature for 1 Oh. It was then concentrated. The title product was purified by preparative HPLC (Xterra T M , column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting 5 Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10), (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (60.0 mg, 34%). 'H NMR (500 MHz,

CD

3 -OD) 8 1.46 - 1.96 (m, 3 H), 2.02 - 2.18 (m, 1 H), 2.19 - 2.38 (m, 1 H), 2.70 - 3.11 (m, 5 H), 3.37 - 3.51 (m, 1 H), 5.08 - 5.29 (m, 1 H), 7.14 - 7.60 (m, 3 H), 8.79 (s, 2 H) ppm; MS (DCI/NH 3 ): 338 (M+H)*. 10 Example 37B (R)-5-[2-( 1-Aza-bicyclo[2.2.2loct-3-yloxy)-pyrimidin-5-yll-3H-benzooxazol-2-one bis(hydrochloride) The product of Example 37A (60 mg, 0.18 mmol) was treated with HCI 15 (Aldrich, 4M in dioxane, 0.25 mL, 1.0 mmol) in EtOAc (3 mL) at ambient temperature for 1 hour to afford the title compound as yellow solid (60.0 mg, 83%). 1 H NMR (500 MHz, CD 3 0D) 8 1.89 - 2.28 (m, 3 H), 2.30 - 2.54 (m, 1 H), 2.61 - 2.76 (m, 1 H), 3.36 3.52 (m, 5 H), 3.82 - 3.99 (m, 1 H), 5.40-5.52 (m, 1 H) 7.20 - 7.47 (m, 2 H), 7.68 (s, 1 H), 8.80 (s, 2 H) ppm; MS (DCI/NH 3 ): 338 (M+H)*. Anal. Calculated for C 18

H

18

N

4 0 3 20 -2.00 HCI -1.50 H 2 0: C, 49.33; H, 5.29; N, 12.78. Found: C, 49.40; H, 5.07; N, 12.60. Example 38 (R)-3-[6-( -Aza-bicyclo[2.2.2loct-3-yloxy)-pyridazin-3-yll-9H-carbazole 25 Example 38A 3-(4,4,5,5-Tetramethyl-[ 1,3,21dioxaborolan-2-yI)-9H-carbazole 3-Bromo-9H-carbazole (Aldrich, 0.97 g, 3.96 mmol) was coupled with bis(pinacolato)diboron (Aldrich, 1.13 g, 4.46 mmol) under the catalysis of dichloro 30 [1,1'-bis(diphenylphosphino)ferrocene]palladium (II) dichloromethane (Aldrich, 103 mg, 0.125 mmol) with KOAc (Aldrich, 1.21 g, 12.3 mmol) in DMF (anhydrous, -94- Aldrich, 25 mL) at 80 0 C overnight according to the procedure of Example 26A, The title compound was purified by chromatography (SiO 2 , gradient 5 to 50% EtOAc hexanes) to give 0.80 g (2.73 mmol, 69% yield). 1 H NMR (300 MHz, CDCl 3 ) 6 1.40 (s, 12 H), 7.26 (s, 1 H), 7.40 - 7.47 (m, 3 H), 7.88 (d, J=7.0 Hz, 1 H), 8.11 (d, J=7.0 5 Hz, 2 H), 8.58 (s, 1 H) ppm. MS (DCI/NH 3 ) m/z 294 (M+H)*. Example 38B (R)-3-[6-( 1-Aza-bicyclo[2.2.2loct-3-yloxy)-pyridazin-3-yll-9H-carbazole The product of Example 9A (0.173g, 0.72 mmol) was coupled with the product 10 of Example 38A (0.267 g, 0.91 mmol) under the catalysis of dichlorobis(triphenyl phosphine)palladium(li) (Aldrich, 5.3 mg, 0.007 mmol) and 2 (dicyclohexylphosphino)biphenyl (Strem Chemicals, 7.3 mg, 0.021 mmol) at 150 *C for 10 min. according to the procedure of Example 29A. The title product was purified by preparative HPLC (Xterra

TM

, column, Xterra RP-18 5 pm, 30 x 100 mm. 15 Eluting Solvent, MeCN / H 2 0 (NH 4

HCO

3 , 0.1 M, pH=10) (v. 40/60 to 70/30 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid. 1 H NMR (300 MHz, CD 3 0D) 6 1.45 - 1.62 (m, 1 H), 1.68 - 1.92 (m, 2 H), 2.00 - 2.15 (m, 1 H), 2.27 - 2.40 (m, Hz, 1 H), 2.75 - 3.05 (m, 5 H), 3.43 - 3.59 (m, Hz, 1 H), 5.22 - 5.42 (m, Hz, 1 H), 7.16 7.24 (m, 1 H), 7.28 (d, J=9 Hz, 1 H), 7.36 - 7.44 (m, 1 H), 7.45 - 7.52 (m, 1 H), 7.57 20 (d, J=8 Hz, 1 H), 8.02 (dd, J=9, 2 Hz, 1 H), 8.17 (t, J=9 Hz, 2 H), 8.67 (s, 1 H) ppm; MS (DCI/NH 3 ) m/z 371 (M+H)*. Example 39 3-[6-( 1H-Indol-3-yl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.2loctane henifumarate 25 Example 39A 3-[6-( 1H-Indol-3-yl)-pyridazin-3-vloxyl-1 -aza-bicyclo[2.2.2loctane 3-Quinuclidinol (Aldrich, 254 mg, 2 mmol) was coupled with 3-(6-chloro pyridazin-3-yl)-1H-indole (Bionet, 458 mg, 2 mmol) at 60 0 C for 16 hours according to 30 the procedure of Example 7A. The title compound was purified by preparative HPLC (Xterra

TM

, column, Xterra RP-18, 5 pm, 30 x 100 mm. Eluting Solvent, MeCN / H 2 0 -95-

(NH

4

HCO

3 , 0.1 M, pH=10), (v. 90/10 to 10/90 over 20 min.) Flow rate, 75 mL/min., uv, 250 nm) as solid (400 mg, 63%). 1 H NMR (MeOH-D 4 , 300 MHz) 1.50 - 1.64 (m, 1 H), 1.71 - 1.93 (m, 2 H), 2.00 - 2.15 (m, 1 H), 2.29 - 2.36 (m, 1 H), 2.78 - 3.04 (m, 5 H), 3.43 - 3.55 (m, 1 H), 5.24 - 5.32 (m, 1 H), 7.12 - 7.25 (m, 3 H), 7.42 - 7.48 (m, 1 5 H), 7.87 (s, 1 H), 8.01 (d, J=9.2 Hz, 1 H), 8.26 - 8.33 (m, 1 H) ppm. MS (DCI/NH 3 ) m/z 321(M+H)*. Example 39B 3-[6-(1H-Indol-3-vl)-pyridazin-3-vloxyl-1-aza-bicvclo[2.2.2loctane hemifumarate 10 The product of Example 39A (200 mg, 0.63 mmol) was treated with fumaric acid (Aldrich, 73 mg, 0.63 mmol) in EtOAc/MeOH(v.10:1, 10 mL) at ambient temperature overnight to give the title compound (247.3 mg, 100%). 1 H NMR (MeOH-D 4 , 300 MHz) 1.76 - 1.91 (m, 1 H), 1.92 - 2.14 (m, 2 H), 2.22 - 2.37 (m, 1 H), 2.51 - 2.58 (m, 1 H), 3.16 - 3.39 (m, 5 H), 3.82 (ddd, J=14.0, 8.2, 1.9 Hz, 1 H), 5.40 15 5.49 (m, 1 H), 6.67 (s, 1 H), 7.12 - 7.26 (m, 3 H), 7.42 - 7.49 (m, 1 H), 7.89 (s, 1 H), 8.05 (d, J=9.5 Hz, 1 H), 8.26 - 8.32 (m, 1 H) ppm. MS (DCI/NH 3 ) m/z 321(M+H)*. Anal. Calculated for CjqH 2 0

N

4 0-0.5 C 4 0 4

H

4 -0.35 H 2 0: C, 65.56; H, 5.95; N, 14.56. Found: C, 65.49; H, 6.21; N, 14.34. 20 Example 40 (R)-3-[6-(1 H-I ndol-3-yl)-pyridazin-3-yloxyl-1 -aza-bicyclo[2.2.21octane funarate The product of Example 4A (127 mg, 1 mmol ) was coupled with 3-(6-chloro pyridazin-3-yl)-1H-indole (Bionet, 229 mg, 1 mmol) according to the procedure of Example 39. The title compound was obtained as solid (208.3 mg, yield, 35%). 1 H 25 NMR (MeOH-d 4 , 300 MHz) 1.90 - 2.24 (m, 3 H), 2.33 - 2.48 (m, 1 H), 2.61 - 2.69 (m, 1 H), 3.32 - 3.55 (m, 5 H), 3.98 (dd, J=13.7, 8.3 Hz, 1 H), 5.49 - 5.57 (m, 1 H), 6.71 (s, 4 H), 7.13 - 7.28 (m, 3 H), 7.46 (d, J=7.1 Hz, 1 H), 7.90 (s, 1 H), 8.07 (d, J=9.2 Hz, 1 H), 8.30 (d, J=7.1 Hz, 1 H) ppm. MS (DCI/NH 3 ) m/z 321(M+H)*. Anal. Calculated for C 1 9

H

2 0N 4 0-2.1 C 4 0 4

H

4 -0.35 EtOAc: C, 58.14; H, 5.29; N, 9.42. 30 Found: C, 57.91; H, 5.35; N, 9.42. -96- Example 41 (S)-3-6-(1 H-Indol-3-yl)-pyridazin-3-vloxyl-1 -aza-bicyclo[2.2.2]octane fumarate The product of Example 13D (127 mg, 1 mmol) was coupled with 3-(6-chloro pyridazin-3-yl)-1H-indole (Bionet, 229 mg, 1 mmol) according to the procedure of 5 Example 39. The title compound was obtained as solid (239 mg, yield, 39%).,H NMR (MeOH-d 4 , 300 MHz) 1.90 - 2.24 (m, 3 H), 2.33 - 2.48 (m, 1 H), 2.61 - 2.69 (m, 1 H), 3.33 - 3.55 (m, 5 H), 3.93 - 4.04 (m, 1 H), 5.49 - 5.57 (m, 1 H), 6.72 (s, 4 H), 7.13 7.28 (m, 3 H), 7.46 (d, J=8.1 Hz, 1 H), 7.90 (s, 1 H), 8.07 (d, J=9.2 Hz, 1 H), 8.30 (d, J=7.1 Hz, 1 H) ppm. MS (DCI/NH 3 ) m/z 321(M+H)*. Anal. Calculated for 10 C 19

H

2 0

N

4 0-2.1 C 4 0 4

H

4 -0.5 EtOAc: C, 58.06; H, 5.37; N, 9.21. Found: C, 57.81; H, 5.54; N, 9.53. Example 42 DETERMINATION OF BIOLOGICAL ACTIVITY 15 To determine the effectiveness of representative compounds of this invention as a7 nAChRs, the compounds of the invention were evaluated according to the [3H]-methyllycaconitine (MLA) binding assay and considering the [3H]-cytisine binding assay, which were performed as described below. 20 [3Hl-Cvtisine binding Binding conditions were modified from the procedures described in Pabreza LA, Dhawan, S, Kellar KJ, [ 3 H]-Cytisine Binding to Nicotinic Cholinergic Receptors in Brain, Mol. Pharm. 39: 9-12, 1991. Membrane enriched fractions from rat brain minus cerebellum (ABS Inc., Wilmington, DE) were slowly thawed at 4 *C, washed 25 and resuspended in 30 volumes of BSS-Tris buffer (120 mM NaCI/5 mM KCI/2 mM CaCl 2 /2 mM MgCl 2 /50 mM Tris-CI, pH 7.4, 4 *C). Samples containing 100-200 pg of protein and 0.75 nM [3H]-cytisine (30 C/mmol; Perkin Elmer/NEN Life Science Products, Boston, MA) were incubated in a final volume of 500 pL for 75 minutes at 4 *C. Seven log-dilution concentrations of each compound were tested in duplicate. 30 Non-specific binding was determined in the presence of 10 pM (-)-nicotine. Bound radioactivity was isolated by vacuum filtration onto prewetted glass fiber filter plates -97- (Millipore, Bedford, MA) using a 96-well filtration apparatus (Packard Instruments, Meriden, CT) and were then rapidly rinsed with 2 mL of ice-cold BSS buffer (120 mM NaCI/5 mM KCI/2 mM CaCl 2 /2 mM MgCl 2 ). Packard MicroScint-20* scintillation cocktail (40 pL) was added to each well and radioactivity determined using a 5 Packard TopCount® instrument. The IC 50 values were determined by nonlinear regression in Microsoft Excel* software. Ki values were calculated from the IC 5 os using the Cheng-Prusoff equation, where Ki = IC 5 0 11+[Ligand]/KD. [3Hl-Methyllycaconitine (MLA) binding 10 Binding conditions were similar to those for [3H]-cytisine binding. Membrane enriched fractions from rat brain minus cerebellum (ABS Inc., Wilmington, DE) were slowly thawed at 4 *C, washed and resuspended in 30 volumes of BSS-Tris buffer (120 mM NaCl, 5 mM KCI, 2 mM CaC1 2 , 2 mM MgC 2 , and 50 mM Tris-CI, pH 7.4, 22 *C). Samples containing 100-200 pg of protein, 5 nM [3H]-MLA (25 C/mmol; Perkin 15 Elmer/NEN Life Science Products, Boston, MA) and 0.1% bovine serum albumin (BSA, Millipore, Bedford, MA) were incubated in a final volume of 500 pL for 60 minutes at 22 *C. Seven log-dilution concentrations of each compound were tested in duplicate. Non-specific binding was determined in the presence of 10 pM MLA. Bound radioactivity was isolated by vacuum filtration onto glass fiber filter plates 20 prewetted with 2% BSA using a 96-well filtration apparatus (Packard Instruments, Meriden, CT) and were then rapidly rinsed with 2 mL of ice-cold BSS. Packard MicroScint-20* scintillation cocktail (40 pL) was added to each well and radioactivity was determined using a Packard TopCount* instrument. The IC 50 values were determined by nonlinear regression in Microsoft Excel* software. Ki values were 25 calculated from the IC 50 s using the Cheng-Prusoff equation, where Ki =

IC

5 o/1+[Ligand]/KD]. Compounds of the invention had Ki values of from about 1 nanomolar to about 10 micromolar when tested by the MLA assay, many having a Ki of less than 1 micromolar. [3H]-Cytisine binding values of compounds of the invention ranged from 30 about 50 nanomolar to at least 100 micromolar. The determination of preferred compounds typically considered the Ki value as measured by MLA assay in view of -98the Ki value as measured by [3H]-cytisine binding, such that in the formula D = Ki 3H cytisine /Ki MLA, D is about 50. Preferred compounds typically exhibited greater potency at 7 receptors compared to a432 receptors. Compounds of the invention are a7 nAChRs ligands that modulate function of 5 a7 nAChRs by altering the activity of the receptor. The compounds can be inverse agonists that inhibit the basal activity of the receptor or antagonists that completely block the action of receptor-activating agonists. The compounds also can be partial agonists that partially block or partially activate the a7 nAChR receptor or agonists that activate the receptor. 10 Some compounds of the invention also have been evaluated for potential binding to the hERG ion channel. Blockade of the hERG ion channel has been associated with interference of heart muscle repolarization, which presents a cardiovascular risk. Binding affinities to the hERG channel were measured by displacement of the radioligand [ 3 H]-dofetilide and expressed in Ki value, i.e. Ki hERG. 15 Compounds of the invention demonstrating a higher ratio of a7 receptor binding to the ratio of hERG binding, i.e. (Ki MLA)/(Ki hERG), were considered to demonstrate a better cardiovascular risk profile. Compounds of the invention that were tested all demonstrated a beneficial cardiovascular risk profile for a7 receptor ligands. It is understood that the foregoing detailed description and accompanying 20 examples are merely illustrative and are not to be taken as limitations upon the scope of the invention, which is defined solely by the appended claims and their equivalents. Various changes and modifications to the disclosed embodiments will be apparent to those skilled in the art. Such changes and modifications, including without limitation those relating to the chemical structures, substituents, derivatives, 25 intermediates, syntheses, formulations and/or methods of use of the invention, may be made without departing from the spirit and scope thereof. -99-

Claims

1. A compound of the formula (1): X-Ar 1 -Ar 2 On A (I) or a pharmaceutically acceptable salt, ester, amide, or prodrug thereof, wherein: n is 0, 1, or 2; A is N or N*-0-; X is selected from the group consisting of 0, S, and -N(R')-; Ar is a 6-membered aromatic ring containing 0, 1, 2, 3, or 4 nitrogen atoms, wherein Ar is substituted with 0, 1, 2, 3, or 4 alkyl groups; Ar 2 is a group of the formula: Z \ Z15 Z 1 Z10",/ \ Z 2 y2 z 2z z z Y z 2 (a) (b) , or (C) Z 1 , Z 2 , Z 3 , and Z 4 are independently selected from the group consisting of C and -C(R 3 b); provided that zero or one of Z 1 , Z 2 , Z 3 , and Z 4 is C; Z 5 , Z 6 , Z 7 , and Z' are independently selected from the group consisting of C and -C(R 3 b); provided that zero or one of Z 5 , Z 6 , Z 7 , and Z 8 is C; z 9 , Z 1 0 , Zll, Z 12 , Z 13 , Z 14 , Z 15 , and Z 16 are independently selected from the group consisting of C and -C(R 3 C); provided that one of Z 9 , Z 1 , Z, Z 12 , ZP, Zi 4 , ZP, and Z 16 is C and the group of formula (c) is attached to Ar through the C atom; -100- Y' at each occurrence is independently selected from the group consisting of 0, S, -N(R 2 ), -C(R 3 ), and -C(R 3 )(R 3 a); Y 2 is selected from the group consisting of -N(R 2 ), C(=0), -C(R 3 ), and -C(R 3 )(R 3 a); Y 3 is selected from the group consisting of -N(R 2 ), -C(R 3 ), and -C(R 3 )(R 3 a); provided that zero or one of Y', Y 2 , and Y 3 is -C(R 3 ) in a group of formula (a); wherein when one of Y', Y 2 , and Y 3 is -C(R 3 ) in a group of formula (a), then ZI, Z 2 , Z 3 , and Z 4 are each -C(R 3 b) and the group of formula (a) is attached to Ar through the C atom of -C(R 3 ) of y1, y 2 , or Y 3 ; and also when one of Z 1 , Z 2 , Z 3 , and Z 4 is C, then Y', Y 2 and Y 3 are other than -C(R 3 ) and the group of formula (a) is attached to Ar through the C atom of Z', Z 2 , Z 3 , or Z4; y2a and y3a are independently selected from the group consisting of N, C and -C(Raa); provided that when Y' is -C(R 3 ) in a group of formula (b), Y 2 ' and y 3 a are selected from the group consisting of N and -C(R 3 a), and when one of y2a and y3a is C, then Y' in a group of formula (b) is 0, S, -N(R 2 ), or -C(R 3 )(R 3 a); wherein when one of Z 5 , Z 6 , Z 7 , and Z' is C, then Y' in a group of formula (b) is selected from the group consisting of 0, S, -N(R 2 ), and -C(R 3 )(R 3 a); y 2 a and y 3 a are each independently selected from the group consisting of N and -C(R 3 a); and the group of formula (b) is attached to Ar through the C of Z 5 , Z 6 , Z 7 , or Z 8 ; and also wherein when Y' in a group of formula (b) is -C(R 3 ) or one of y2a and y 3 a is C, then Z5, Z 6 , Z 7 , and Z 8 are each -C(R 3 b) and the group of formula (b) is attached to Ar through the C atom of -C(R 3 ) of Yl in the group of formula (b) or through the C atom of y2, or y3a; R' and R 2 at each occurrence are each independently selected from the group consisting of hydrogen and alkyl; R 3 and R3a at each occurrence are each independently selected from the group consisting of hydrogen, halogen, alkyl, aryl, -OR 4 , -NR 5 R 6 , -alkyl-OR 4 , and -alkyl-NR 5 R 6 ; -101- R 3 b and R 3 at each occurrence are each independently selected from the group consisting of hydrogen, halogen, alkyl, aryl, -OR 4 , -NR 5 R , -alkyl-OR 4 , -alkyl-NR 5 R 6 , and -SCN; R 4 is selected from the group consisting of hydrogen, alkyl, aryl, alkylcarbonyl, and arylcarbonyl; R 5 and R 6 at each occurrence are each independently selected from the group consisting of hydrogen, alkyl, aryl, alkylcarbonyl, alkoxycarbonyl, aryloxycarbonyl, and arylcarbonyl, provided that at least one of R 5 and R 6 is hydrogen or alkyl; and R 8 is selected from the group consisting of hydrogen and alkyl.

2. The compound of claim 1, wherein Ar is a group of the formula: x1_x3 x2 4 (b) wherein: X1, X 2 , X 3 , and X 4 are each independently selected from the group consisting of N and -CR 10 ; and R 1 0 at each occurrence is independently selected from the group consisting of hydrogen and alkyl.

3. The compound of claim 1, wherein Ar is selected from the group consisting of: -102- RO R0R0R 10 RIO N N R10 R 10 R R10 R 1 0 R1 R and N-N adN R 1 0 wherein R 10 at each occurrence is independently selected from the group consisting of hydrogen and alkyl.

4. The compound of claim 1, wherein Ar 2 is selected from the group consisting of: R z z 5 S 71-11z 8 y3a z 5 /5 0 Z6,-' zi 1 N N N 8 72/ a 8 Y 3a 8 .- 3a z5 N 8" Y3a z12 Z R (i )(iii) (iv) R 2 6 5 0 Z5 Z\ Z 2a 2a Z 2a z 7z (v) (vi) (vii) N O (viii) (ix) -103- 14 R2 Z 15 Z Z 5 N Z Z 5 S Z9 N N1 N Z , Z N , and Z Z Ra (x) (xi) (xii) wherein: ZI, Z 2 , Z 3 , and Z 4 are independently selected from the group consisting of C and -C(R 3 b); provided that one of Z 1 , Z 2 , Z 3 , and Z 4 is C and formula (ix) is attached to Ar through the C atom of Z 1 , Z 2 , Z 3 , and Z 4 ; Y' is selected from the group consisting of 0, S, and -C(R 3 )(R 3 a); Z 5 , Z 6 , Z 7 , and Z 8 are independently selected from the group consisting of C and -C(R 3 b); provided that zero or one of Z 5 , Z 6 , Z 7 , and Z 8 is C; y2a and y3a are independently selected from the group consisting of C and C(R 3 a); wherein when one of Z 5 , Z 6 , Z 7 , and Z 8 is C, then y2a and y3a in the group of formulae (i)-(vii) are each -C(R 3 a); and each of the group of formulae (i)-(vii) is attached to Ar' through the C of Z 5 , Z 6 , Z 7 , or Z 8 ; and also wherein when one of y2a and y 3 a is C in the group of formulae (i)-(vii), then Z 5 , Z 6 , Z 7 , and Z 8 are each -C(R 3 b) and each of the group of formulae (i)-(vii) is attached to Ar' through the C atom of y2a or y3a; and R 2 , R 3 , R 3 a, R 3 b, R 8 , Z 9 , Z 1 0 , Z 11 , Z1 2 , Z 1 3 , Z 1 4, Z 15 , and Z 16 are as defined in claim 1.

5. The compound of claim 1, or a pharmaceutically acceptable salt, ester, amide, or prodrug thereof, selected from the group consisting of: 3-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 4-[4-(1-azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 5-[4-(1-azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 5-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-1 H-indole; -104-

6-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 2-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1 H-indole; 5-[6-(1 -azabicyclo[2.2.2]oct-3-yloxy)pyridazin-3-yl]-1 H-indole; 4-[6-(l -azabicyclo[2.2.2]oct-3-yloxy)pyridazin-3-yl]-1 H-indole; 5-{6-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyridazin-3-yl}-1 H-indole; 5-{6-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyridazin-3-yl}-3-methyl-1 H-indole; 5-{2-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyrimidin-5-yl}-1 H-indole; 4-{2-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyrimidin-5-y}-1 H-indole; 5-{2-[(3S)-1 -azabicyclo[2.2.2]oct-3-yloxy]pyrimidin-5-yl}-1 H-indole; 5-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-3-methyl-1 H-indazole; 6-[4-(1 -azabicyclo[2.2.2]oct-3-yloxy)phenyl]-1,3-benzothiazol-2-amine; 6-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-1,3-benzothiazol-2-amine; 6-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-4-thiocyanato-1,3 benzothiazol-2-amine; 6-{4-[(3R)-1 -azabicyclo[2.2.2]oct-3-yloxy]phenyl}-4-bromo-1,3-benzothiazol-2 amine; N-[4-(3-methyl-1 H-indazol-5-yl)phenyl]quinuclidin-3-amine; (R)-3-[6-(3-methyl-1 H-indazol-5-yl)-pyridazin-3-yloxy]-1 -aza bicyclo[2.2.2]octane; (R)-3-[6-(1-methyl-1 H-indol-5-yl)-pyridazin-3-yloxy]-1 -aza bicyclo[2.2.2]octane; (R)-{5-[6-(1 -aza-bicyclo[2.2.2]oct-3-yloxy)-pyridazin-3-y]-1 H-indol-3-ylmethyl} dimethyl-amine; (R)-3-[6-(1H-indol-5-yl)-pyridazin-3-yloxy]-1-aza-bicyclo[2.2.2]octane 1-oxide; 6-{6-[(3R)-1 -aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-yI}-benzothiazol-2 ylamine; (3R)-3-[6-(3-bromo-1 H-indol-5-yl)-pyridazin-3-yloxy]-1 -aza bicyclo[2.2.2]octane; 5-{6-[(3R)-1 -aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-y}-1,3-dihydro-indol-2 one; -105- 5-{6-[(3R)-1 -oxy-1 -Aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-yl}-1,3-dihydro indol-2-one; 5-{6-[(3R)-1 -aza-bicyclo[2.2.2]oct-3-yloxy]-pyridazin-3-yl}-1, 3-dihydro benzoimidazol-2-one; (R)-3-[6-(1 H-benzoimidazol-5-yl)-pyridazin-3-yloxy]-1 -aza bicyclo[2.2.2]octane; (S)-3-[6-(1 H-indol-5-yl)-pyridazin-3-yloxy]-1 -aza-bicyclo[2.2.2]octane; (R)-3-[5-(1 H-indol-5-yl)-pyridin-2-yloxy]-1 -aza-bicyclo[2.2.2]octane; (3R)-3-[5-(1H-indol-4-yl)-pyrimidin-2-yloxy]-1-aza-bicyclo[2.2.2]octane 1 oxide; (3R)-3-(5-benzooxazol-5-y-pyrimidin-2-yloxy)-1 -aza-bicyclo[2.2.2]octane; (3R)-3-[5-(2-methyl-benzooxazol-5-y)-pyrimidin-2-yloxy]-1 -aza bicyclo[2.2.2]octane; (3R)-3-[5-(2-ethyl-benzooxazol-5-y)-pyrimidin-2-yloxy]-1 -aza bicyclo[2.2.2]octane; (3R)-3-[5-(2-phenyl-benzooxazol-5-y)-pyrimidin-2-yloxy]-1 -aza bicyclo[2.2.2]octane; (R)-5-[2-(1 -aza-bicyclo[2.2.2]oct-3-yloxy)-pyrimidin-5-yl]-3H-benzooxazol-2 one; (R)-3-[6-(1 -aza-bicyclo[2.2.2]oct-3-yloxy)-pyridazin-3-yl]-9H-carbazole; 3-[6-(1 H-indol-3-yl)-pyridazin-3-yloxy]-1 -aza-bicyclo[2.2.2]octane; (R)-3-[6-(1 H-indol-3-yl)-pyridazin-3-yloxy]-1 -aza-bicyclo[2.2.2]octane; and (S)-3-[6-(1 H-indol-3-yl)-pyridazin-3-yloxy]-1 -aza-bicyclo[2.2.2]octane. 6. A pharmaceutical composition comprising a therapeutically effective amount of a compound of claim 1 in combination with a pharmaceutically acceptable carrier.

7. A method of selectively modulating the effects of a7 nicotinic acetylcholine receptors in a mammal comprising administering an effective amount of a compound of claim 1. -106-

8. A method of treating or preventing a condition or disorder selected from the group consisting of attention deficit disorder, attention deficit hyperactivity disorder (ADHD), Alzheimer's disease (AD), mild cognitive impairment, senile dementia, AIDS dementia, Pick's Disease, dementia associated with Lewy bodies, dementia associated with Down's syndrome, amyotrophic lateral sclerosis, Huntington's disease, diminished CNS function associated with traumatic brain injury, acute pain, post-surgical pain, chronic pain, inflammatory pain, neuropathic pain, infertility, need for new blood vessel growth associated with wound healing, need for new blood vessel growth associated with vascularization of skin grafts, and lack of circulation, more particularly circulation around a vascular occlusion, comprising the step of administering a compound of claim 1.

9. The method according to claim 1, wherein the condition or disorder is selected from the group consisting of a cognitive disorder, neurodegeneration, and schizophrenia.

10. The method according to claim 1, further comprising administering a compound of claim 1 in combination with an atypical antipsychotic. -107-