AU2003204320B2 - Heterocycles useful in the treatment of benign prostatic hyperplasia and intermediates thereof - Google Patents

Description

-1-

AUSTRALIA

PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

Name of Applicant/s: Ortho-McNeil Pharmaceutical, Inc.

Actual Inventor/s: Richard H. Hutchings and Haripada Khatuya and Gee-Hong Kuo and William V. Murray and Catherine P. Prouty and Xiaobing Li Address for Service: Baldwin Shelston Waters MARGARET STREET SYDNEY NSW 2000 CCN: 3710000352 Invention Title: HETEROCYCLES USEFUL IN THE TREATMENT OF BENIGN PROSTATIC HYPERPLASIA AND INTERMEDIATES THEREOF Details of Original Application No. 10783/99 dated 09 Oct 1998 The following statement is a full description of this invention, including the best method of performing it known to me/us:- File: 27720AUP01 500164754 1.DOC/5844 -1A- HETEROCYCLES USEFUL IN THE TREATMENT OF BENIGN PROSTATIC HYPERPLASIA AND INTERMEDIATES THEREOF The present application is a divisional application of Australian Application No. 10783/99, which is incorporated in its entirety herein by reference.

This invention relates to a series of aryl piperazine substituted heterocycles, pharmaceutical compositions containing them and intermediates used in their manufacture. The compounds of the invention selectively inhibit binding to the a-la adrenergic receptor, a receptor which has been implicated in benign prostatic hyperplasia. As such the compounds are potentially useful in the treatment of this disease.

BACKGROUND

Benign prostatic hyperplasia (BPH), a nonmalignant enlargement of the prostate, is the most common benign tumor in men.

Approximately 50% of all men older than 65 years have some degree of BPH and a third of these men have clinical symptoms consistent with bladder outlet obstruction (Hieble and Caine, 1986). In the U.S., benign and malignant diseases of the prostate are responsible for more surgery than diseases of any other organ in men over the age of fifty.

There are two components of BPH, a static and a dynamic component. The static component is due to enlargement of the prostate gland, which may result in compression of the urethra and obstruction to the flow of urine from the bladder. The dynamic component is due to increased smooth muscle tone of the bladder neck and the prostate itself (which interferes with emptying of the bladder) and is regulated by alpha 1 adrenergic receptors (al-ARs).

The medical treatments available for BPH address these components to varying degrees, and the therapeutic choices are expanding.

Surgical treatment options address the static component of BPH and include transurethral resection of the prostate (TURP), transurethral incision of the prostate (TUIP), open prostatectomy, balloon dilatation, hyperthermia, stents and laser ablation. TURP is the gold standard treatment for patients with BPH and approximately 320,000 TURPs were performed in the U.S. in 1990 at an estimated cost of $2.2 billion (Weis et al., 1993). Although an effective treatment -2for most men with symptomatic BPH, approximately 20 25% of patients do not have a satisfactory long-term outcome (Lepor and Rigaud, 1990). Complications include retrograde ejaculation (70-75% of patients), impotence postoperative urinary tract infection and some degree of urinary incontinence (Mebust et al., 1989). Furthermore, the rate of reoperation is approximately 15-20% in men evaluated for 10 years or longer (Wennberg et al., 1987).

Apart from surgical approaches, there are some drug therapies which address the static component of this condition. Finasteride (Proscar", Merck), is one such therapy which is indicated for the treatment of symptomatic BPH. This drug is a competitive inhibitor of the enzyme Sa-reductase which is responsible for the conversion of testosterone to dihydrotestosterone in the prostate gland (Gormley et al., 1992). Dihydrotestosterone appears to be the major mitogen for prostate growth, and agents which inhibit 5a-reductase reduce the size of the prostate and improve urine flow through the prostatic urethra. Although finasteride is a potent Sa-reductase inhibitor and causes a marked decrease in serum and tissue concentrations of dihydrotestosterone, it is only moderately effective in treating symptomatic BPH (Oesterling, 1995). The effects of finasteride take 6-12 months to become evident and for many men the clinical improvement is minimal (Barry, 1997).

The dynamic component of BPH has been addressed by the use of adrenergic receptor blocking agents (al-AR blockers) which act by decreasing the smooth muscle tone within the prostate gland itself.

A variety of al-AR blockers (terazosin, prazosin, and doxazosin) have been investigated for the treatment of symptomatic bladder outlet ,obstruction due to BPH, with terazosin (Hytrin", Abbott) being the most extensively studied. Although the al-AR blockers are welltolerated, approximately 10-15% of patients develop a clinically adverse event (Lepor, 1995). The undesirable effects of all members of this class are similar, with postural hypotension being the most commonly experienced side effect (Lepor et al., 1992). In comparison 3 to the 5a-reductase inhibitors, the al-AR blocking agents have a more rapid onset of action (Steers, 1995). However, their therapeutic effect, as measured by improvement in the symptom score and the peak urinary flow rate, is moderate. (Oesterling, 1995) The use of al-AR antagonists in the treatment of BPH is related to their ability to decrease the tone of prostatic smooth muscle, leading to relief of the obstructive symptoms. Adrenergic receptors are found throughout the body play a dominant role in the control of blood pressure, nasal congestion, prostrate function and other processes (Harrison et al., 1991). However, there are a number of cloned al-AR receptor subtypes: ala-AR, alb-AR and cld-AR (Bruno et al., 1991; Forray et al., 1994; Hirasawa et al., 1993; Ramarao et al., 1992; Schwinn et al., 1995; Weinberg et al., 1994). A number of labs have characterized the cl-ARs in human prostate by functional, radioligand binding, and molecular biological techniques (Forray et al., 1994; Hatano et al., 1994; Marshall et al., 1992; Marshall et al., 1995; Yamada et al., 1994). These studies provide evidence in support of the concept that the ala-AR subtype comprises the majority of al-ARs in human prostatic smooth muscle and mediates contraction in this tissue. These findings suggest that the development of a subtype-selective ala-AR antagonist might result in a therapeutically effective agent with reduced side effects for the treatment of BPH.

The compounds of this invention selectively bind to the ala-AR receptor, antagonize the activity of said receptor and are selective for prostate tissue over aortic tissue. As such, these represent a viable treatment for BHP without the side effects associated with known al-AR antagonists.

in -4- SSUMMARY OF THE INVENTION SAccording to a first aspect, the present invention provides a compound of Z Formula I 00 R2\

O

0

R

1 N N A N R, N/

I

wherein: RI is hydrogen, halogen, Cl-5alkoxy, hydroxyl, or Ci-6alkyl; R2 is Ci-6alkyl, substituted Cl-6alkyl where the alkyl substituents are one or more halogens, phenyl, substituted phenyl where the phenyl substituents are independently selected from one or more of the group consisting of Clisalkyl, Ci-salkoxy, and trihaloC 1 or substituted where the phenyl substituents are independently selected from one or more of the group consisting of C-.salkyl, halogen, C 1 salkoxy, and trihaloCi-lalkyl;

R

3 is hydrogen, Cl.salkoxycarbonyl, C 1 .salkyl, hydroxyCls 5 alkyl, formyl, acetyl, amido, or oxygen where if R3 is oxygen the hashed line is solid and is taken together with the other solid line to represent a double bond, and if R 3 is not oxygen, the hashed line represents a single bond affixed to a hydrogen; A is selected from the group consisting of

NH

2 0

-N

0F---

N-

R

4

-N

-N

OH

N N

SH

N 'N O O 0 OH 0 0 NH 2 OH OH OH NH 2 and where the points of attachment are depicted by the hashed bonds, where one point of attachment is bonded to the methylene adjacent to the depicted piperazine and the second point of attachment is bonded to the other methylene; is hydrogen or:Cl.salkyl; is hydrogen or oxygen, where if B is oxygen the hashed line is solid and is taken together with the other solid line to represent a double bond, and if B is hydrogen the hashed line represents a single bond affixed to a hydrogen; in -6- ,Ic Z is -(CH 2 where n is 1 or

-CH

2

-CR

5

R

6

-CH

2 -CHRsR 6

CH-

Z where R 5 and R 6 are hydrogen, Ci.salkyl or taken together to 00 _form a C3.

8 cycloalkane, or

O,

II x where ring X is an aromatic ring of 6 members or pharmaceutically acceptable salts thereof.

A second aspect of the present invention provides a compound and pharmaceutically acceptable salts thereof selected from the group consisting of

O

O N N N o 0

NH-N

S0 N

SH

2 N 0 0 Nn

O

(N

and N<

N

A third aspect of the present invention provides a pharmaceutical composition comprising a compound according to the first aspect and a pharmaceuticlly acceptable carrier or diluent.

A fourth aspect of the present invention provides a pharmaceutical composition comprising a compound according to the second aspect and a pharmaceutically acceptable carrier or diluent.

~I j in -8c A fifth aspect of the present invention provides a medicament useful in treating a patient afflicted with a disease mediated by the Xa- a adrenergic receptor comprising an Z effective dose of a compound according to the first aspect.

00 Aside from the compounds of Formula I, the invention contemplates compounds of Formula II and Formula III. These compounds are useful as intermediates in the O preparation of compounds of Formula I.

A sixth aspect of the present invention provides a compound of Formula II Cc R2 0 (N E R, N N

H

II

wherein: RI is hydrogen, halogen, Ci- 5 alkoxy, hydroxyl, or C 1 .6alkyl; R2 is C 1 -6alkyl, substituted C 1 -6alkyl where the alkyl substituents are one or more halogens, phenyl, substituted phenyl where the phenyl substituents are independently selected from one or more of the group consisting of C1.salkyl, Cisalkoxy, and or substituted phenylCi .alkyl where the phenyl substituents are independently selected from one or more of the group consisting of Cisalkyl, halogen, C 5 .salkoxy, and trihaloCl.salkyl; E is oxygen or N-OH A seventh aspect of the present invention provides a compound of Formula III R2 0 O RI-N N Q-R 7

ITT

wherein: in -8a-

R

1 is hydrogen, halogen, Ci.salkoxy, hydroxyl, or Cl-6alkyl;

R

2 is Cl-6alkyl, substituted Cl-6alkyl Z where the alkyl substituents are one or more halogens, phenyl, substituted 0_ phenyl where the phenyl substituents are independently selected from one or more O of the group consisting of Ci 5 alkyl, Cl-salkoxy, and trihaloCl-salkyl,

C

cr phenylCi-5alkyl, or substituted phenylCi- 5 alkyl Swhere the phenyl substituents are independently selected from one or more of the group consisting of Clisalkyl, halogen, Clsalkoxy, and 10 trihaloCi.salkyl;

R

7 is formyl, halomethyl, hydroxymethyl, t-butyldiphenylsilyloxymethyl, Ci- 6 alkoxycarbonyl, and carboxy; and Q is selected from the group consisting of S or where the points of attachment are depicted by the hashed bonds, where one point of attachment is bonded to the methylene adjacent to the depicted piperazine and the second point of attachment is bonded to R 7 An eighth aspect of the present invention provides a method of treating a disease mediated by the a- a adrenergic receptor comprising administering a therapeutically effective amount of a compound according to the first aspect to a subject in need thereof.

A ninth aspect of the present invention provides use of a compound according to the first aspect in the manufacture of a medicament for treating a disease mediated by the a- a adrenergic receptor.

Unless the context clearly requires otherwise, throughout the description and the claims, the words 'comprise', 'comprising', and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

S- 8b

O

O DETAILED DESCRIPTION OF THE INVENTION SThe terms used in describing the invention are commonly used and known to those Z skilled in the art. However, the terms that could have other meanings are defined.

0_ "HBSS" refers to Hank's Balanced Salt Solution. "Independently" means that when there are more than one substituent, the substitutents may be different. The term "alkyl" 0 refers to straight, cyclic and branched-chain alkyl groups and "alkoxy" refers to O-alkyl c where alkyl is as defined supra. "LDA" refers to lithium diiopropylamide, and "LAH" Srefers to lithium aluminum hydride. The symbol "Ph" refers to phenyl, and "aryl" includes mono and fused aromatic rings such as phenyl and naphthyl. The symbol "CPDA" refers to 1,1-cyclopentanediacetimid -1-yl and "IID" refers to 1H-isoindole, 1, 3 (2H)dion-1-yl.

The compounds of the invention may be prepared by the following schemes, where some schemes produce more than one embodiment of the invention. In those cases, the choice of scheme is a matter of discretion which is within the capabilities of those skilled in the art.

The compounds of Formula I where Ri is hydrogen, R 2 is phenyl, R3 is hydrogen, A is 2-mercaptopyrimidine, B is oxygen and Z is (CH 2 4 may be prepared using Scheme 1. The starting material for this scheme is a mono N-substituted piperazine of type la.

This starting material is treated at reflux for about 18-24 h with a mild base such as

K

2

CO

3 and an alkylating agent such as chloroacetone to 9 give intermediate lb. Compound lb may be treated with a strong base, such as NaH and reagent Ic, such as hexahydro-2-oxo-1.H-azepine-lacetic acid ethyl ester, at 0 °C to room temperature over 1-16 h, to give the diketo compound Id. This compound may be treated with may be treated with a mild base such as sodium acetate, reagent le, such as thiourea, in an alcoholic solvent such as EtOH at about room temperature to reflux over 1-3 days to give a compound of Formula 1 where R 2 is phenyl, A is 2 -mercaptopyrimidine, and Z is (CH 2 4 Aside from the illustrated compound, Scheme 1 may be used to prepare a number of other compounds of the invention. For example, to prepare compounds where A is 2 -hydroxypyrinmidine, reagent le is replaced with urea and the remaining steps of the scheme are executed as described. To prepare compounds where A is pyrazole, the illustrated reagent le, is replaced with hydrazine and the remaining steps are carried out as described. To prepare compounds where A is pyrazole and R 4 is C.l-alkyl, reagent le is replaced with an appropriately substituted R-alkylhydrazine. Compounds where A is isoxazole may be prepared using this scheme. Treatment of intermediate ld with hydroxylamine hydrochloride and an equivalent of an organic base, such as pyridine in an alcoholic solvent such as methanol over several hours at 20-100 °C gives the desired products.

Aside from the heterocyclic A substituents, Scheme I may be used to prepare compounds of Formula 1 where A is 0 0 In addition to modifications of A, Scheme 1 may be used to prepare compounds where Z is (CH 2 1 The substitution of the illustrated reagent lc with another known cyclic lactam gives the desired compounds. For example to prepare compounds where Z is CH 2 replace hexahydro-7-oxo-lH-azepine-2-carboxylic acid, with 4-oxo-2azetidine carboxylic acid ethyl ester. In order to modify R, and R 2 known phenyl substituted piperazines may be used in place of la. For example to prepare a compound where R, is fluoro and R2 is 2,2,2- 10 trifluoroethyl, l-( 2 -pherioxy)phenylpiperazine is replaced with 1-(4fluoro-2- 2 -triflUoroethoxy)pheny1J piperazine.

Scheme Ph 0 lb r"l-'Et on-

H

2 N IKNH 2 l~e 11 Scheme 2 may be used to prepare compounds of the invention where R, is hydrogen, R 2 is phenyl, R3 is hydrogen, A is isoxazole,

B

is oxygen and Z is (CH)z2. Reagent la may be treated with bromoethanol and a mild base such as K 2

CO

3 in an inert solvent such as THF at reflux over several days to give the alcohol 2a. Treatment of 2a with DM50 and oxalyl chloride and triethylamine in THF for several hours at a temperature range of -78 OC to room temperature give the aldehyde 2b. Subsequent treatment of 2b with hydroxylamine in an alcoholic solvent such as ethanol at room temperature over 8-36 hours gives the oxime 2c. Treatment of 2c with the lactam 2d, aqueous NaOCI and a trace of triethylamine at room temperature over several days gives a compound of Formula I where R, is hydrogen,

R

2 is phenyl, R 3 is hydrogen, A is isoxazole, B is oxygen and Z is (CHz) 2 Aside from the illustrated product, Scheme 2 may be used to prepare a variety of compounds of the invention. For example to prepare a compound where A is 3,4-dihydroisoxazole and Z is (CH 2 4 reagent 2d is replaced with hexahydro-l-(2-propenyl)-2H-azepine-2one. To prepare compounds where Z is (CHz) 3 and A is isoxazole replace 2d with hexahydro-1-(2-propynyl)-2H-azepine-2-one. To prepared compounds where R, and R 2 are other than phenyl and hydrogen, respectively, the starting piperazine may be modified as suggested in Scheme 1.

12 Scheme 2 Ph 0 f\N -N OH Na 2a 2b 0 2d Ph 0 NN N .OH I NJ

H

13 As illustrated, Scheme 3 may be used to produce compounds of the invention where RI is chlorine, R2 is methyl, R, is hydrogen, A is oxazole, B is oxygen and Z is (CH 2 2 Treatment of 3a, 2bromomethyl-4-carbomethoxyoxazole, with an analogue of starting material la, namely 1-( 4 -chloro-2-methoxyphenyl]piperazine, and an organic base such as diisopropylethylamine in an inert solvent at reflux for 1-16 h gives the coupled intermediate 3b. Successive treatment of 3b with a reducing agent such as NaBH 4 at room temperature to reflux, followed by a halogenating agent such as thionyl chloride at room temperature gives the chloride 3c. Treatment of the chloride 3c with a cyclic lactam 3d, such as 2 -pyrrolidinone, and a strong base such as potassium hydride, in an inert solvent such as THF over several minutes to 6 h at room temperature gives the illustrated compound of Formula 1.

This scheme may be used to prepare compounds of the invention where A is thiazole. One can replace 3a with 2-bromomethyl-4carboethoxythiazole and carry out the remaining steps of Scheme 3 to obtain those compounds. To prepare compounds where

R

3 is alkyl, replace 3d with an alkylated lactam such as 6-methyl-2-piperidone.

If compounds where R3 is Cl..alkoxycarbonyl are desired, replace 3d with 6 -oxo-2-piperidine carboxylic acid ethyl ester. In addition one can prepare compounds where B is hydrogen by replacing 3d with cyclic amines such as piperidine. As in other schemes, modifications of the substitution patterns at R 1 R, and Z may be accomplished by using analogues of la and 3d respectively. In addition to the aforementioned products, Scheme 3 may be used to produce compounds where A is imidazole. For example to produce compounds where A is thiazole replace the illustrated starting material 3a with ethyl-2- (brmomehyl)imidazole-4-carboxylate and follow the remaining steps of Scheme 3.

14 Scheme 3 Br 0. CO Me 3a Me r N-0 C 0 2 Me I\N~j\ Me 0 NC1 C1 N H N6 3d Scheme 4 may be used to prepare compounds where R, is chlorine, R2 is methyl,

R

3 is hydrogen A is pyridine, B is oxygen and Z is (CHz) 4 Reactant 4a, 2 6 -bischloromethylpy ridine, is treated with a la analogue and an organic base such as pyridine at reflux f or about h to give the coupled product 4b. Treatment of 4b with a cyclic lactam derivative, 4c, a strong base such a n-BuLi in an inert 15 solvent from 0 .c to reflux give the illustrated compound of Formula I. In addition to the illustrated compounds Scheme 4 may be used to synthesize compounds where R 1

R

2 R3, and Z are other than chlorine, methoxy, hydrogen, oxygen, and (CH 2 4 respectively as stated in Schemes 1-3.

Scheme 4

N

C1 N 1 4a Me 0

N

NI

I

0

C

4b

HN

Ac Me 0

NN

To prepare compounds w.here A is thlophene, Sch eme 5 may be Used. Reagent 5a, 2 -bromo-5-thiophenecarboxaldehyde, may be treated with an analogue of la, NaBH(OAC)3 and acetic acid in an inert solvent such as mnethylene chloride at room temperatu re for about 3-10 h to give the coupled product 5b. Treatment of Sb with a strong base 16 such as n-butyllithium and DMF at -78 °C to 0 °C gives the aldehyde This intermediate may be treated with a reducing agent such as NaBH 4 to give the alcohol 5d. This alcohol is treated with thionyl chloride in an inert solvent such as methylene chloride at room temperature for about 6 h; and is subsequently treated with a cyclic lactam and a strong base such a NaH in an inert solvent such as DMF at room temperature to give a compound of Formula I. Although the illustrated product of Scheme 5 is a 2 ,5-substituted thiophene, the scheme may be used to produce 2 ,4-substitutied thiophenes. The 2,4substituted compounds may be produced by substituting 2-bromo-4thiophenecarboxaldehyde, for the illustrated reagent Sa. In addition this scheme may be used to prepare all of the R 1

R

2

R

3 B and Z substitutions of the invention as discussed in previous schemes.

17 Scheme 0 Br

H

Me 0O Br

IN

Me 0 0 Me r N OH

N\~

00 0 0 18 The products of Scheme 5 may be used to prepare other compounds as illustrated by Scheme 6. To produce compounds of the invention where B is hydrogen, A is thiophene,

R

2 is phenyl,

R

3 is carboethoxy, and Z is (CHz) 3 the 2 -phenoxy analog of intermediate 5c may be treated with NaBH(OAc) 3 triethyl amine and reactant 6a, 2piperidinecarboxylic acid ethyl ester hydrochloride, at room temperature over 4-12 h to give the desired ester derivative of Formula I Aside from the illustrated ester derivative, Scheme 5 may be used to prepare the hydroxymethyl derivative by treating the ester with NaBH 4 and an inert solvent, such as methanol, at room temperature over 30 min. This hydroxymethyl derivative could be oxidized under standard Swern conditions to give the corresponding aldehyde.

19 Scheme 6

H

-A O 2E t 6 Ph

CO

2 Et N PPh 0 0

N~

To prepare. compounds where B is oxygen, A is isoxaoe 2 i phenyl.,

R

3 is carboethoxy and Z is (CH 2 3 Scheme 7 may be used.

I

20 Treatment of la with propargyl bromide and a mild base such as KzCO 3 in an inert solvent such as acetonitrile gives the alkynyl intermediate 7a. Treatment of 7a with triethylamine, 2-(2nitroethoxy)tetrahydropyran and phenyl isocyanate in an inert solvent such as toluene at about 60 °C over 24 to 48 h followed by treatment with aqueous acid at room temperature over 1-5 h gives the alcohol intermediate 7b. Intermediate 7b may be treated with thionyl chloride in an inert solvent such as methylene chloride at room temperature over 1-12 h to give the chloride 7c. Treatment of 7c with one equivalent of a strong base, such as NaH and reactant 7d, namely 6-oxo-2-piperidine carboxylic acid ethyl ester in an inert solvent such as DMF at room temperature over 10-24 h gives the desired compound of Formula

I.

In addition to the illustrated product, Scheme 7 may be used to produce compounds of the invention where B is hydrogen.

Replacement of reagent 7d with another cyclic lactam such as proline methyl ester gives a compound of the invention where

B

is hydrogen, A is isoxazole,

R

2 is phenyl,

R

3 is carboethoxy and Z is (CH 2 1 Aside from the aforementioned products, Scheme 7 may be used to prepare all of the R 1 R R 3 B, and Z substitutions of the invention as discussed in previous schemes.

21 Scheme 7 la Ph 0 fN N

OH

O-N

CO

2 Et

HN,

0~ 7d Ph SN\~J/

C

7c Ph

CO

2 Et 0 r f N

N

N \0 22 To prepare compounds of the invention where B is oxygen, A is thiophene,

R

2 is phenyl,

R

3 is carboethoxy and Z is (CH 2 4 Scheme 8 may be used. Treatment of 3 -thiophenemethanol with a silylating agent such as t-butyldiphenylchlorosilane and imidazole at room temperature in an inert solvent such as DMF over 10-48 h gives intermediate 8a. This intermediate may be formylated with DMF and a strong base such as t-butyllithium at about -78 OC over 30 min to 2 h to give the aldehyde 8b. Reductive amination of the aldehyde with intermediate la NaBH(OAc) 3 and glacial acetic acid at room temperature over 3-6 h gives the coupled intermediate 8c. This intermediate may be deprotected with tetrabutylammonium fluoride in THF at room temperature to give alcohol 8d. This alcohol may be chlorinated with thionyl chloride and an inert solvent such as methylene chloride at room temperature for 1-10 h and subsequently coupled with reagent 8e. A strong base such as NaH and a suitable solvent such as DMF facilitate this reaction which proceeds at room temperature over 10-24 h to give the desired compound of Formula 1.

In addition to the illustrated product, Scheme 8 may be used to produce compounds of the invention where B is hydrogen. Replacement of reagent 8e with another cyclic lactam such as proline methyl ester gives a compound of the invention where B is hydrogen, A is thiophene, Rz is phenyl,

R

3 is carboethoxy and Z is (CH 2 2 Compounds where B is hydrogen and R 3 is hydrogen may also be prepared in this manner by this scheme. Replacement of 8d with proline gives a compound of the invention where B is hydrogen, A is thiophene,

R

2 is phenyl,

R

3 is hydrogen and Z is (CH 2 Aside from the aforementioned products, Scheme 8 may be used to prepare all of the RI, R 2 R3, B and Z substitutions of the invention as discussed in previous schemes.

-23 Scheme 8 OH

OTBDPS

8a 0

H

S

8b

OTBOPS

OPh

N

8 cZ OPh

NOTBDPS

I

24 To prepare compounds where A is OH OH ,cheme 9 may be i. Scheme 9 may be used. Treatment of compound Id with a reducing agent such as NaBH 4 in a suitable solvent such as MeOH tive the desired diol. Aside from the diol, this scheme may be used to prepare compounds where A is 0

NH

2 Compound id may be treated with aqueous ammonium hydroxide at room temperature over several days to give the unsaturated product as a mixture of regioisomers. This product may be treated with a reducing agent such as sodium in liquid ammonia at about -33 *C over 2-8 h to give the desired saturated product.

I

25, Scheme 9 0 NH 2 Ph0 00

NH

2 0 26 Scheme 10 may be used to produce compounds where A is O OH 0 OH The ketone 10a is treated with LDA in an inert solvent at -78 o C for about 2h and this mixture is treated with the aldehyde to give the desired alcoholic compound of the invention. This alcohol may be dehydrated by treatment with methanesulfonyl chloride, DMAP and an organic base over several hours at aboutroom temperature to give the unsaturated products. In order to produce the regioisomer of the illustrated products, the starting materials are modified by preparing the ketone functionality on the piperazine containing starting material; and preparing an aldehyde on the cyclic lactam piece. With respect to other modifications of the generic structure, the same methods which were used in previous schemes, may be incorporated into Scheme 27 Scheme 0 Ph0 O ky 0 f N J 1Oa N N j 1Ob Ph 0

[NN

Ph 0 00 Although the claimed compounds are useful as antagonists of ala-AR, some compounds are more active that others and are either preferred or particularly preferred. The preferred compounds of the invention include: 28 29 EtO 2

C'

and *The particularly preferred compounds of Formula I include compounds where: hydrogen,

C:.

6 alkyl, hydrogen, phenyl or substituted phenyl,

S

0 ;or

N-

0 A is B is oxygen, 30 Z is

(CH

2 and n is. 1-4.

As indicated by the biological activity, the compounds of Formula I may be used in pharmaceutical compositions to treat patients (humans and other primates) with disorders related to inhibiting the activity of the ala adrenergic receptor. The preferred route is oral administration, however compounds may be administered by intravenous infusion. Oral doses range from about 1- 100 mg/kg daily. Infusion doses can range from about 0.01-1 mg/kg/min of inhibitor, admixed with a pharmaceutical carrier over a period ranging from several minutes to several days.

The pharmaceutical compositions can be prepared using conventional pharmaceutical excipients and compounding techniques.

Oral dosage forms may be elixers, syrups, capsules tablets and the like. Where the typical solid carrier is an inert substance such as lactose, starch, glucose, methyl cellulose, magnesium sterate, dicalcium phosphate, mannitol and the like; and typical liquid oral excipients include ethanol, glycerol, water and the like. All excipients may be mixed as needed with disintegrants, diluents, granulating agents, lubricants, binders and the like using conventional techniques known to those skilled in the art of preparing dosage forms. Parenteral dosage forms may be prepared using water or another sterile carrier.

Typically the compounds of Formula I are isolated and used as free bases, however the compounds may be isolated and used as their pharmaceutically acceptable salts. Examples of such salts include hydrobromic, hydroiodic, hydrochloric, perchloric, sulfuric, maleic, fumaric, malic, tartatic, citric, benzoic, mandelic, methanesulfonic, hydroethanesulfonic, benzenesulfonic, oxalic, pamoic, 2naphthalenesulfonic, p-toluenesulfonic, cyclohexanesulfamic and saccharic.

31 Aside from their biological activity, the compounds of the invention where A is 0 0 0 OH ,and 0 NH 2 are useful as intermediates in the manufacture of other compounds of the invention.

In order to illustrate the invention the following examples are included. These examples do not limit the invention. They are meant only to suggest a method of practicing the invention. Those skilled in the art may find other methods of practicing the invention, which are obvious to them. However those methods are deemed to be within the scope of this invention.

PREPARATIVE

EXAMPLES

Example 1 0 0 Cpd. 1 Chloroacetone (3.8 mL, 48.2 mmoll and K 2 CO3 (10.0 g, 72.4 mmol) were added to a solution of 1-( 2 -isopropoxyphenyl)piperazine (10.6 g, 48.2 mmol) and the resulting mixture was heated at reflux for 1 day.

The mixture was filtered, and the filtrate was concentrated in vacuo to yield the title compound as a solid which was used without purification: 1 H NMR (300 MHz, CDC1 3 d 6.91 4H), 4.59 1H), 3.25 2H), 3.15 (bt, 4H), 2.67 (bt, 4H), 2.19 3H), 1.34 (d, 6H, J 6.03 Hz); MS m/z 277 32 Example 2 N

N

Cpd. 2 A solution of compound 1 (1.95 g, 7.0 mmol) and 1- (ethoxycarbonylmethyl)-2-piperdone (2.61 g, 14.1 mmol) in THF (10.0 mL) was slowly added to a suspension of sodium hydride (95% tech.

356.0 mg, 14.0 mmol) in THF (20.0 mL). MeOH was added in catalytic amount and the mixture was stirred at room temperature under N 2 for 4 h. The resulting mixture was quenched with sat. aq. NH 4 CI and extracted with ethyl acetate. The combined organic layer was dried (NazSO 4 filtered and concentrated in vacuo. The residue was purified by MPLC on silica gel using CH2Cl/MeOH/triethylamine (95:3:2) as an eluent to give compound 2 as an oil: 1H NMR (300 MHz,

CDCI

3 d 6.91 4H), 4.59 1H), 4.26 4.18 (2s, 2H), 3.69 3.30 (2s, 2H), 3.35 (m 2H), 3.20 (bs, 2H), 3.14 (bs, 4H), 2.69 (m, 4H), 2.46 2H), 1.86 4H), 1.34 (2d, 6H, J 6.06 Hz); MS m/z 416 The activity of compound 2 in the ala, alb and Llc screens was 417, >10000 and 6043 nm respectively.

Example 3 0 N\ N- NH Cpd. 3 The mixture of compound 2 (572.0 mg, 1.4 mmol) and hydrazine monohydrate (103.0 mg, 2.1 mmol) in ethanol was stirred at room temperature for 3 h. The solvent was removed in vacuo, and the 33 residue was purified by MPLC on silica gel using 3% MeOH/CH 2 Cl 2 as an eluent to give the title compound, compound 3, as a solid: 'H NMR (300 MHz, CDC13) 8 6.91 4H), 6.17 1H), 4.59 1H), 4.48 (s, 2H), 3.61 2H), 3.34 2H), 3.12 (bs, 4H), 2.67 (bs, 4H), 2.42 2H), 1.78 4H), 1.34 6H, J 6.10 Hz); MS m/z 412 Example 4 00 N\.s NN Cpd. 4 The mixture of compound 3 (119 mg, 0.29 rmol), guanidine hydrochloride (109 mg, 1.15 mmol) and sodium acetate (238 mg, 2.90 mnol) in ethanol (20.0 mL) was heated at 50 °C for 1 day. The solvent was removed in vacuo, and the residue was dissolved in ethyl acetate and washed with successive portions of water. The organic layer was dried (NaSO 4 filtered and the filtrate was concentrated in vacuo. The residue was. purified by MPLC on silica gel using MeOH/CH 2 Cl 2 as an eluent to give compound 4 the title compound as an oil: 1H NMR (300 MHz, CDC1,) 5 6.91 4H), 6.70 1H), 5.07 (bs, 2H), 4.59 1H), 4.50 2H), 3.48 2H), 3.34 2H), 3.14 (bs, 4H), 2.66 (bs, 4H), 2.49 2H), 1.85 4H), 1.34 6H, J 6.06 Hz); MS m/z 439 Example Cpd. 34 Bromoethanol (2.1 mL, 29.0 nmmol) and KzCO 3 (4.6 g, 33.5 mmnol) were added to a solution of N-1-( 2 -isopropoxyphenyl)piperazine (4.9 g, 22.3 mmol) in acetonitrile (100 mL) and the resulting mixture was heated at reflux for 2 days. The mixture was filtered, and the filtrate was concentrated in vacuo. The residue was purified by MPLC on silica gel using 50% EtOAc/hexanes as an eluent to give compound as an oil: 'H NMR (300 MHz, CDC1 3 8 6.91 4H), 4.59 1H), 3.68 2H, J 5.43 Hz), 3.27 (bs, 1H), 3.12 (bs, 4H), 2.68 (bs, 4H), 2.60 2H, J 5.40 Hz), 1.34 6H, J 6.03 Hz; MS m/z 265 Example 6

ON

Ng-

H

Cpd. 6 A solution of DMSO (0.74 g, 9.5 mmol) in CH 2 C1 2 (5.0 mL) was added slowly to a stirred solution of oxalyl chloride (0.66 mL, 7.6 mmol) in THF at -78 oC under nitrogen and the resulting mixture was stirred for 30 min. A solution of compound 5 (1.0 g, 3.8 nmol) in CH 2 Cl 2 mL) was added and the mixture was stirred at -78 oC for 5 h.

Triethylamine (4.2 g, 42.0 ntol) was added and the mixture was allowed to warm to room temperature. After 30 min, water (100 mL) was added and the mixture was extracted with CHzCl1. The combined organic layer was dried (NaSO 4 filtered, and the filtrate was concentrated in vacuo to give compound 6 as an oil without further purification.

35 Example 7

SN-OH

Cpd. 7 Pyridine (1.5 g, 19.0 mmol) was added slowly to a solution of compound 6 (1.1 g, 3.8 mmol) and hydroxylamine hydrochloride (0.26 g, 3.7 mmol) in ethanol (30 mL). The resulting mixture was stirred at room temperature overnight and the solvent was removed in vacuo.

The residue was dissolved in EtOAc and washed with successive portions of water. The organic layer was dried (NaSO,), filtered and the filtrate was concentrated in vacuo to give compound 7 as an oil without further purification: H NMR (300 MHz, CDCI 3 5 7.55 1H, J 6.06 Hz), 6.91 4H), 4.59 1H), 3.72 (dd, 1H, J 7.02 Hz), 3.23 1H, J 6.08 Hz), 3.15 6H), 2.73 (bs, 4H), 1.34 6H, J= 6.08 Hz); MS m/z 278 Example 8 N-b \N

N

Cpd. 8 Aqueous NaOCI (11.4 mL, 7.9 mmol) and triethylaumine (0.04 mL, 0.3 n.nol) were added in 4 portions separately over 40 h to a stirred solution of compound 7 (190.5 mg, 0.7 mmol) and N-propargyl 8valerolactam (140.0 mg, 1.0 mmol) in CH 2 C1 2 (15 mL) and the mixture was stirred at room temperature over this period. The mixture was poured into water and extracted with ether. The combined The organic 36 layer Was dried NaSO 4 filtered and .the filtrate was concentrated in vacUo. The residue was purified by MPLC on silicagel eluting with EtOAc to. give the title compound as an oil; 'H NNR (300 MHz, CDCl3) 8 6.91 4H), 6.26 1H), 4.67 Cs, 2H), 59 IH), 3.64 Cs, 2H) 3.41 2H, J 5. 65 Hz) 3.12 (bs, 4H) 2.68 Cbs, 4H), 2.43 2H, J1 5.65), 1.83 (in, 4H), 1.34 6H, J7 6.04 Hz); MS m/z 413 Example 9.

Cpd 9 Aqueous NaCl (11. 4 mL, 7.9 nmmol) and triethylamine (0.04 xnL, 0. 3 nmmol) were added in 4 separate .portions over 40 h to a stirred Solution of. Compound 7 (200.0 mng, 0.7 inmol) and N-allyl 8- Valerolactan (150.0 mg, 1.1 iniol) in CH 2 Cl 2 (15 ML.) at room temperature. The mixture was poured into water and extracted with ether. The combined organic layer was dried CNaSO4), filtered and the filtrate was Concencrated in vacuo. The residue was puri fied by MPLC on silica gel eluting with 70% EtOAc/hexanes to give the title compound as an oil: 'H NMR (300 MHz, CDCl 3 5 6.91 Cm, 4H), 4.86 (m, 1H) 4.59 Cm, 1H) 3. 87 Cdd, lH, J 3.33 Hz) 3.57 Cm, 1H) 3.41 (m, 1H), 3.30 2H), 3.-17 2H) 3. 11 (C(bs, 4 H) 2. 84 Cdd, 1H, J= 7.58 2.63 4H, .7 3.28 Hz) 2.40 Cm, 2H) 1.79 Cm, 4H), 1.34 Cd, 6H, J =6.06 Hz) MS mlz 415 37 Example

-K

N N' CO 2 Me Cpd. 1-(2-Isopropoxyphenyl)piperazine (1.3 g, 6.0 mmol), 2-bromomethyl-3carbomethoxyoxazole (1.2 g, 5.4 mmol), and diisopropylethylamine (1.4 mL, 8.1 mmol) were combined in THF (25 mL) and heated to reflux (3h).

The reaction mixture was cooled to room temperature, diluted with ethyl acetate (50 mL), washed with water and brine. The combined organic extracts were dried (Na 2 and concentrate to a crude oil.

Purification by flash silica gel chromatography using hexane/ethyl acetate/triethylamine [13:6:1] as an eluent compound 10 as a yellow glass: 1 H NMR (300 MHz, CsDE) d; LCMS (CI) m/z 1) Example 11 N N CI Cpd. 11 A solution of compound 10 (379 mg, 1.05 mmol) in absolute ethanol mL) was combined with NaBH 4 (95 mg, 2.5 mmol) and heated at reflux for lh. The reaction mixture was cooled to room temperature, quenched with water (35 mL) and adjusted to pH <4 using IN HC1. The reaction mixture was subsequently adjusted to a pH 6 with sat.

NaHCO 3 and extracted (3X) with ether/ethyl acetate The organic extracts were combined, washed with water and brine, dried (Na 2

SO

4 and concentrated in vacuo to give the crude alcohol as a colorless oil: *H NMR (300 MHz, CiD 6 6 7.03 1H); 6.86-6.91 (m, 38 2H); 6.75-6.80 2H); 4.43 2H); 4.32 (septet, J 6.0 Hz, 1H); 3.49 2H); 3.07 (br m, 4H); 2.59 (br m, 4H); 1.12 J= 6.0 Hz, 6H); LCMS (CI) m/z 332 (M The crude alcohol (210 mg, 0.63 mmol) in CHzCI 2 (4 ml) was combined with thionyl chloride (1.0 mL, 13.5 mmol) and allowed to stir (16h). The solvent and excess thionyl chloride were removed in vacuo and the residue was concentrated from benzene The remaining salts were partitioned between

CH

2 C1 2 and aqueous NaHCO 3 The organic layer was separated, washed with brine, dried (Na 2

SO

4 and concentrated to give 200 mg of 11 as a tan oil: 'H NMR (300 MHz, C 6

D

6 8 6.87-6.92 2H); 6.85 1H); 6.74-6.79 2H); 4.31 (septet, J 6.0 Hz, 1H); 4.05 2H); 3.42 Cs, 2H); 3.04 (br m, 4H); 2.56 (br m, 4H); 1.12 J 6.0 Hz, 6H); LCMS (CI) m/z 350 1).

Example 12

NO

NY 0 Cpd 12 B-Valerolactam (86 mg, 86 mmnol) was added to an ice cold suspension of potassium hydride (44 mg, 1.12 mmol) in THF (4 mL) and stirred for 15 min. A solution of compound 11 (50 mg, 0.14 mmol) in DMF (2 mL) was added to this mixture and the resulting mixture was allowed to stir overnight. The reaction mixture was carefully quenched with water (25 mL) and extracted (3X) with ether/ethyl acetate The combined extracts were washed with water (5X) and brine, dried (Na 2

SO

4 and concentrated to crude oil. Purification by flash silica gel chromatography using ethyl acetate/triethylamine [19:1] as an eluent provided compound 12, the title compound as a colorless glass: 'H NMR (300 MHz, C.D 6 5 7.40 1H); 6.85-6.93 2H); 6.75- 6.80 2H); 4.41 2H); 4.32 (septet, J 6.0 Hz, 1H); 3.50 (s, 39 2H); 3.05 (br m, 6H); 2.60 (br m, 4H); 2.15 (br m, 2H); 1.14-1.34 (m, 4H); 1.12 J= 6.0 Hz, 6H); LCMS (CI) m/z 413 1).

Example 13 r S

CO

2 Et Cpd. 13 N-bromosuccinimide (2.58 g, 14.5 mmol) and AIBN (158 mg, 0.965 nmol) were added to a stirred solution of 2 (1.65 g, 9.65 mmol) in CC1 4 (40 mL). The mixture was stirred at for 5 h, an additional portion of AIBN (158 mg, 0.965 mmol) was added and the resulting mixture was stirred for another 16 h at 80 The mixture was cooled, filtered thru celite and the filtrate was concentrated in vacuo. The residue was purified by column chromatography on silica gel using CHClz/hexane as an eluent to give compound 13 (1.09g, 13%) gas a dark-red oil: MS 250 Example 14 Et0 2 C- N O Compound 14 The fumarate salt of 4 2 -isopropyloxyphenyl)piperazine (2.78 g, nmmol) was basified with 20% NaOH (70 mL) and extracted with CH 2 C1 2 The combined organic layer was dried (Na 2

SO

4 and concentrated in vacuo to give a yellowish oil. A mixture of the yellowish oil, compound 13 (1.94 g, 7.76 mmol) and triethylamine (1.57 g, 15.52 mmol) in l-imethyl-2-pyrrolidinone (15 mL) was stirred at 85 0 C for 21 h and quenched with water. The resulting organic layer was extracted with ether, dried (Na 2

SO

4 and concentrated in vacuo. The product was purified by column chromatography on silica gel EtOAc/hexane to give compound 14 as a red oil (2.27 g, 69%) MS 390 (MH).

Example 40 N

N

HON

Cpd. A mixture of compound 14 (2.27 g, 5.8 mmol) and sodium borohydride (1.1 g, 29 mmol) was stirred at 78 °C for 5 h. Water was added and the mixture was acidified to pH 7 with 1 N HC1 The aqueous mixture was extraced with several portions of ether and the combined organic extracts were dried (Na 2 S0 4 and concentrated in vacuo. The residue was purified by column chromatography on silica gel CHzCl2/acetone to give compound 15 (1.64 g, 81%) as yellow-brown oil: MS 348 Example 16 Cpd. 16 A mixture of compound 15 (1 g, 2.9 mmol) and thionyl chloride (1.7 g, 14.3 mmol) in CH 2 cl 2 (5 mL) was stirred at 20 *C for 20 h. Ice was added and the mnixture was basified to a pH of 7-8 by the dropwise addition of NaHCO 3 The resulting aqueous layer was extracted with CH 2 C1 2 and the combined organic extracts were dried (NazSO 4 and concentrated in vacuo to the crude chloride as a dark-red oil: MS 368 The 6-valerolactam (344 mg, 3.47 mmol) was dissolved in THF mL) and treated with n-BuLi (2.2 mL, 1.6 M, 3.5 mmol) at 20*C for min. A solution of the crude chloride (850 mg, 2.32 mmol) in DMF (2 mL) was added and the resulting mixture was stirred at 80 0 C for 20 h.

The reaction mixture was partitioned between water and ether. The organic extracts dried (Na 2

SO

4 and concentrated in vacuo. The residue was purified by column chromatography on silica gel 41 EtOAc/hexane to give compound 16 as yellow-brown oil: MS 429 Example 17 0 0 Cpd. 17 2 -Pyrrolidinone (30 mg, 0.36 mmoll was dissolved in THF (2 mL) and treated with n-BuLi (0.23 mL, 1.6 M, 0.36 mmol) at 20 *C for min. A solution of the crude chloride (87 mg, 0.24 mmol) in DMF (1 mL) was added and the mixture was stirred at 80 C for 3 h. The resulting mixture was partitioned between water and the aqueous layer was extracted with several portions of ether. The combined organic extracts were dried (NazSO 4 and concentrated in vacuo. The residue was purified by column chromatography on silica gel EtOAc/hexane to give compound 17 (18 mg, 18%) as yellow oil: MS 415 (MH).

Example 18

CI

Cpd. 18 1-(2-Isopropoxyphenyl)piperazine 2.0 g (5.9mmol) was treated with 2 ,6-bis(chloromethyl)pyridine (3.1g, 1 7 .8mmol) and triethylamine (11.9mmol). The resulting brownish solution was heated at reflux in THF (anhydrous) 40ml for 3h. The solution was cooled and treated with cone. HCI, (1 mL) ether and water (10 mL). The product was extracted into the aqueous layer, basified (sat NaHCO 3 and extracted into ether. The combined organic extracts were 2 concentrated, in vacuo to give compound 18 as a syrup 0.

9 8g Example 19 42 N~Nb 0 Cpd. 19 A solution of c-caprolactam (95 mg, 0.8mmol) in anhydrous THF (1 mL) was treated with 1.6 M n-BuLi (0.5 mL, O.8mmol) at 0 OC under Nz. The resulting suspension was treated with a solution of compound 18 (215 mg, 0.6mmol) in anhydrous DMF(1 heated at reflux for 2h and cooled. The resulting mixture was treated with water and extracted into ether. The combined organic layers were dried (Na 2

SO

4 and concentrated in vacuo. The residue was purified by flash chromatography on silica gel using varying concentration of

CH

2 C1 2 /MeOH (50:1, 40:1, 30:1, 20:1) to givecompound 19 (0.176, MS m/z 437 MH' ;.H 1 NMR(CDC1 3 8 7.62 J7.7Hz, 1H), 7.35 (d, J=7.4Hz, 1I), 7.16 J=7.6Hz, 1H), 6.89 (m 4H), 4.72 2H), 9 J=12Hz, 1H), 3.71 2H), 3.42 2H), 3.14 (brs 4H), 2.69 (brs, 4H), 2.62 2H), 1.71 6H), 1.33 J=5.99Hz, 6H).

Example Br

N

Example Glacial AcOH (1.8 mL, 31.4 mmol) and NaBH(OAc) 3 (8.65 g, 40.8 mmol) were successively added to a stirred solution of 1-(2methoxyphenyl)piperazine (6.4 g, 31.4 mmol) and 5-bromo-2thiophenecarboxaldehyde (6.0 g, 31.4 mnmol) in CH 2 C1 2 at room temperature. The mixture was stirred for 4 h and partitioned between ether and satd. Na 2

CO

3 This mixture was extracted with several portions of ether and the combined organic extracts were washed with 43 brine, dried (NaSO 4 and concentrated. The residue was flushed through a short silica gel plug eluting with EtOAc to obtain compound 'HNMR (300 MHz, CDCl 3 8 (ppm) 6.84 7.03 5H), 6.68 J 3.6 Hz, IH), 3.85 3H), 3.71 2H), 3.09 (bs, 4H), 2.69 (bs, 4H); MS m/z 367 and 369 Example 21

H

0

S

Cpd. 21 1.7M t-Butyllithium (7.9 mL, 13.4 mmol) was added to a solution of compound 20 (4.1 g, 11.2 mmol) in THF at -78 DMF (2.0 mL, 25.8 mmol) was added after 1 h and the resulting mixture was stirred for another 6 h at -78 The reaction mixture was warmed to 0 °C, quenched by addition of satd. NH 4 ,C and extracted with ethyl acetate.

The combined organic extracts were washed with brine, dried (Na 2

SO

4 and concentrated in vacuo. The material was flushed through a short silica gel plug and eluted with EtOAc to afford compound 21: 'HNMR (300 MHz, CDC1 3 8 (ppm) 9.85 lh), 7.64

J

3.7 Hz, 1H), 7.06 J 3.7 Hz, 1H), 6.84 7.01 4H), 3.85 3H), 3.81 2H), 3.11 (bs, 4H), 2.73 J 4.5 Hz, 4H); MS m/z 317 (MH) 44 Example 22 0 S OH Cpd. 22 NaBH 4 (1.26 g, 34.1 mol) was added portionwise to a solution of the above compound 21 (3.6 g, 11.4 mmol) in MeOH at ambient temperature. The solvent was removed after 0.5 h and sat'd.

NH

4 CI was added to the residue. The aqueous layer was extracted with EtOAc, and the combined organic extracts were washed with brine, dried (Na 2 S0 4 and concentrated in vacuo. The residue was was purified by flash chromatography on silica gel using ethyl acetate/hexanes (20 EtOAc in hexanes) as an eluent to give compound 21:'HNMR (300 MHz,

CDC

3 8 (ppm) 6.79 7.02 6H), 4.77 2H), 3.85 3H), 3.75 2H), 3.09 (bs, 4H), 2.70 (bs, 4H), 1.99 (bs, 1H); MS m/z 319 Example 23

N

Cpd. 23

SOCC

2 (3.0 mL, excess) was added to compound 22 (0.182 g, 0.57 mmol) in CH 2 CIZ (5.0 mL). The reaction was stirred for 6 h and concentrated in vacuo to give the crude chloro derivative. In a separate flask pyrrolidinone (0.098 g, 1.16 mmol) was added slowly to a suspension of NaH (0.055 g, 2.3 mol) in DMF. After 0.5 h a solution of the chloro derivative in DMF (1.0 mL) was injected dropwise to the later.

The resulting mixture was stirred for 18 h, quenched by the addition 45 of sat'd. NH 4 Cl and extracted with EtOAc. The combined extracts were successively washed with water and brine, dried (Na 2

SO

4 and concentrated in vacuo. The residue was purified by column chromotography on silica gel chromatography using EtOAc/hexanes 25%) to give compound 23 'HNMR (300 MHz, CDCl,) 8 (ppm) 6.77 7.00 6H), 4.57 2H), 3.85 3H), 3.74 2H), 3.37 J Hz, 2H), 3.10 (bs, 4H), 2.69 (bs, 4H), 2.42 J 8.1 Hz, 2H), 2.01 (quin, J= 7.5 Hz, 2H); MS m/z 386 Example 24 C0 2 Et 0

N

FN

Cpd. 24 Et 3 N (1.05 mL, 7.5 mmol) and NaBH(COAc) 3 (1.73g, 8.2 mmol) were successively added to a stirred solution of compound 21 (2.0 g, 6.3 mmol) and L-proline methyl ester hydrochloride (1.04 g, 6.3 mmol) in CHzClz at room temperature. After 6 h the reaction mixture was quenched with sat'd. Na 2

CO

3 and extracted with CHzCl 2 The combined organic extracts were washed with brine, dried (Na2SO 4 and concentrated. The residue was purified by flash chromotography on silica gel using EtOAc/hexanes (10-20 %]to give compound 24: 'H NMR (300 MHz, CDCl 3 8 (ppm) 6.78 7.02 4H), 6.76 J 3.4 Hz, 1H), 6.74 J 3.4 Hz, 1H), 4.03 J 14.0 Hz, 1H), 3.86

J

14.0 Hz, 1H), 3.85 3H), 3.74 2H), 3.70 3H), 3.33 (dd, J 5.8 Hz, 8.7 Hz, 1H), 3.10 (bm, SH), 2.70 (bs, 4H), 2.55 (dd, J= Hz, 8.0 Hz, 1H), 1.61 2.18 4H); MS m/z 430 46 Example Cpd. Propargyl bromide (80 wt. in toluene; 9.4 mL, 84.0 mmol) was added to a mixture of 1-(2-isopropoxyphenyl)piperazine (15.4 g, 70.0 mol) and K 2 CO, (12.58 g, 91.0 nrol) in CH 3 CN, and heated at 65 OC for 24 h. The reaction mixture was concentrated and purified by flash chromotography on silica gel using 5-10% EtOAc/hexanes as an eluent to give compound 25.

I

HNMR (300 MHz, CD

C

l3) 8 (ppm) 6.85 6.98 (m, 4H), 4.60 (sept, J= 6.1 Hz, 1H), 3.36 J= 2.4 Hz, 2H), 3.16 (bs, 4H), 2.76 J 4.6 Hz, 4H), 2.28 J 2.4 Hz, 1H), 1.34

J

6.1 Hz, 6H); MS m/z 259 (MH) Example 26 N O-N Cpd. 26 Et 3 N (0.8 mL, 5.6 mmol) was injected slowly to a flask containing compound 25 (14.5 g, 56.1 mmol), 2 -(2-nitroethoxy)tetrahydropyran (14.8 g, 84.2 mmol) and PhNCO (24.4 mL, 224.5 mmol) in toluene. The reaction mixture was heated at 62 °C for 32 h and cooled to ambient temperature. Water (10.0 mL) was added and the resutling mixture was stirred for 2 h. The solid by-product was removed by filtration and the filtrate was concentrated to obtain a dark viscous material which was used without further purification.

47 The dark material was dissolved in ether (80 mL) and stirred with IN HCl (100 mL) for 2 h. The reaction was then neutralized with sat'd. NazCO, and extracted with EtOAc. The combined organic extracts were washed with brine, dried (Na 2

SO

4 and concentrated. The residue was purified by flash chromatography on silica gel using 20-50 EtOAc/ hexanes as an eluent to give compound 26: 1 HNMR (300 MHz, CDC1 3 8 (ppm) 6.84 6.98 4H), 6.29 1H), 4.76 2H), 4.59 (sept, J 6.1 Hz, 1H), 3.75 2H), 3.14 (bs, 4H), 2.72 J 4.6 Hz, 4H), 2.22 (bs, IH), 1.34 J 6.1 Hz, 6H); MS m/z 332 (MH) Example 27 N -N Cpd. 27 Thionyl chloride (3.0 mL, excess) was added to compound 26 (0.4 g, 1.2 mmol) in CH 2 C1 2 (5.0 mL) and the reaction was stirred for 6 h at ambient temperature. The volatile components were then removed in vacuo. The residue was dissloved in EtOAc and neutralized with 10 NaHCO 3 The organic layer was successively washed with water and brine, dried (Na 2

SO

4 and concentrated. Evaporated the solvent and toluene were added to the residue and the solution was concentrated in vacuo to give compound 27, which was used without further purification:'HNMR (300 MHz, CDC1 3 5 (ppm) 6.85 6.98 4H), 6.35 IH), 4.59 2H), 4.58 (sept, J 6.3 Hz, 1H), 3.76 2H), 3.14 (bs, 4H), 2.73 (bs, 4H), 1.34 J 6.3 Hz, 6H).

48 Example 28 N O-N0 Cpd. 28 Pyrrolidinone (0.

1 95g, 2.3 mmol) was added slowly to a suspension of NaH (0.055 g, 2.3 mmol) in DMF. After 0.5 h a solution of cpd. 27 mL DMF) was injected followed by addition of KI (.02 g, cat.). Stirred for 18 h, then sat'd. NHCI was added and extracted with EtOAc. The combined extracts were successively washed with water and brine, dried (Na 2 So and concentrated. The residue was purified by chromatography on silica gel using 20-30% EtOAc/hexanes) to give compound 28: 1 HNMR (300 MHz, CDC 1 3 s (ppm) 6.84 6.98 (m, 4H), 6.19 s, IH), 4.59 (sept, J 6.0 Hz, 1 4.52 2H), 3.72 s, 2H), 3.39 (t J 7 .0 Hz, 2H), 3.13 (bs, 4H), 2.70 (bs, 4H), 2.43 J= 8.1 Hz, 2H), 2.05 (quin, J 7.5 Hz, 2H), 1.34

J

6.0 Hz, 6H): MS m/z 399 Example 29

S

OTBDPS

Cpd. 29 t-Butyldiphenylchlorosilane (11.3 mL, 43.3 mmol) was added to a stirred solution of 3 -thiophenemethanol (4.5 g, 39.4 mmol) and imidazole (5.9 g, 86.7 mmol) in DMF at room temperature. After 24 h the reaction mixture was quenched with brine and worked up using EtOAc. The combined organic extracts were washed with brine, dried (Na 2

SO

4 and concentrated in vacuo The residue was purified on a silica gel pad, eluting with ether and concentrating in vacuo to give the compound 29: 'HNMR (300 MHz, CDC13) 5 (ppm) 7.69 4H), 7.34 49 7.43 6H), 7.27 (dd, J 1.7 Hz, 3.1 Hz, 1H), 7.15 (dd, J 1.4 Hz, 2.6 Hz, 1H), 6.99 (dd, J 1.0 Hz, 3.6 Hz, 1H), 4.76 2H), 1.08 9H).

Example 0 H S

OTBDPS

Cpd. t-Butyllithium (1.7 M; 0.84 mL, 1.4 mmol) was added to a solution of 3-(t-butyldiphenylsilyloxymethyl)thiophene (0.42 g, 1.2 mmol) in THF at -78 DMF (0.23 mL, 3.0 mmol) was added after 1 h and stirring continued for another 6 h at -78 OC. The mixture was allowed to warm to 0 quenched by addition of sat'd.

NH

4 Cl and extracted with EtOAc. The combined organic extracts were washed with brine, dried (Na 2 SO4), and concentrated. Although the 'HNMR of the crude residue showed compound 30 as the predominant product along with a trace of an unidentified material, the residue was used without further purification: 'HNMR (300 MHz, CDCl 3 5 (ppm) 9.87 1H), 7.67 (dd, J 1.4 Hz, 6.0 Hz, 4H), 7.61 J 0.8 Hz, 1H) 7.55 (bs, 1H). 7.36 7.44 6H), 4.74 2H), 1.09 9H):MS m/z 381 Example 31 0 0N N

OTBDPS

Cpd. 31 Glacial AcOH (0.55 mL, 10.0 mmol) and NaBH(OAc) 3 (2.76 g, 13.0 mmol) were successively added to a stirred solution of 1-(2-isopropoxyphenyl)piperazine (2.2 g, 10.0 mmol) and compound 50 (3.8 g, 10.0 mmol) in CH 2 C1 2 at room temperature. After 4 h the reaction mixture was quenched by slow addition of. sat'd. NaZCO 3 and extracted with CHzCl 2 The combined organic extracts were washed with brine, dried (Na 2

SO

4 and concentrated. The material was flushed through a short silica gel plug eluting with EtOAc to compound 31: 'HNMR (300 MHz, CDCI 3 6 (ppm) 7.68 J 7.4 Hz, 4H), 7.35 7.44 6H), 7.06 (bs, 1H), 6.84 6.94 4H), 6.81 (bs, 1H), 4.70 (s, 2H), 4.59 (sept, J 6.0 Hz, 1H), 3.72 2H), 3.13 (bs, 4H), 2.66 (bs, 4H), 1.33 J 6.0 Hz, 6H), 1.08 9H); MS m/z 585 (MH Example 32 N Cpd. 32 TBAF 1.0 M in THF; 11.7 mL, 11.7 mmol) was added to a solution of compound 31 (5.7 g, 9.8 mmol) in THF and the resulting mixture was stirred overnight. Brine was added and the mixture was extracted with EtOAc. The combined organic extracts were washed with brine, dried (NaZS0 4 and concentrated. The residue was purified by flash chromatography on silica gel using 5-20% EtOAc/ hexanes as an eluent, to give the corresponding alcohol: 1 HNMR (300 MHz, CDC1 3 8 (ppm) 7.12 1H), 6.84 6.95 5H), 4.63 2H), 4.59 (sept, J 6.2 Hz, 1H), 3.74 2H), 3.12 (bs, 4H), 2.67 (bs, 4H), 1.71 (bs, 1H), 1.34 J 6.2 Hz, 6H); MS m/z 347 (MH) SOC1 2 (3.0 mL, excess) was added to the alcohol (0.2 g, 0.57 nmmol) in CHzcl 2 (5.0 mL). The reaction was stirred for 6 h then concentrated in a rotary evaporator and dried in vacuo to obtain the crude foamy chloro derivative, which was used immediately without purification.

Pyrrolidi~none (0.098 g, 1.16 mmol. was added slowly to a suspension of NaH (0.055 g, 2.3 n=01) in.DMF. After 0.5 h, a solution of the chioro derivative in DMF (1.0 mL) was injected to the reaction mixture and the reaction was stirred for 18 h. Sat'd.

NH

4 CI was added and the mixture was extracted with several portions of EtOAc.

The co mbined extracts were succesiively washed with water and brine, dried (Na 2

SO

4 and concentrated. The product was purified by colum chromatography on silica gel using 10-25% EtOAc/hexanes as an eluent to afforded compound 32: .'HNMR (300 MHz, CDC13) 8 (ppm) 7.02 Cbs, 1H), 6.84 6.91 Cm, 4H), *6.84 Cbs, IH), 4.59 (sept, J 6.0 Hz, lu),.

4.39 Cs, 2H) 3.72 Cs, 2H), 3.31 Ct, J 7. 0 Hz, 2H) 3.12 Cbs, 4H), 2.65 Cbs, 4H) 2.43 J 8..0 Hz, 2H) 2.-00 (quin, J7 7.5 Hz, 2H), 1. 34 J1 6. 0 Hz, 6H) MS m/z 414 52 Example 33 Cpd. 33 An aqueous solution of ammonium hydroxide 2.0 mL) was added to a solution of compound 2 (160 mg, 0.38 mmol) in EtCH (25.0 mL) and the resulting mixture was stirred at room temperature for 3 days.- EtCH was removed under reduced pressure and the residue was taken up in ethyl acetate. This solution was washed with successive portions of water and the combined organic layer was dried (NazSO 4 filtered and the filtrate was conc entrated in vacuo. The residue was purifie d by MPLC on silica gel using 3-5% MeCH in CHzC1 2 to afford a mixture of regiaisomers as oil: 'H NMR (300 MHz, CDCl1 3 d 6.91 Cm, 4H), 4.59 (in, 4.15 2H), 3.33 3.30 (2s, 3H), 3.11 (mn, 6H), 2.64 2H) 2.42 4H) 1. 86 4H) 1. 34 6H, J 6. 06 Hz; MS m/z 415 The activity of compound 33 in the oila, c~lb and a1c screens was 317, >10000 and 1268 rim respectively.

53 Example 34

H

Cpd. 34 DIBAL(H) (35.0 mL, 1M solution in toluene) was slowly added to a solution of 1-(2-acetonitrile)-4-(2-isopropoxyphenyl)piperazine g, 23.0 mmol) in toluene (50.0 mL) at -78 OC under Nz and the resulting mixture was stirred at this temperature for 3 h. The mixture was then warmed to room temperature and stirred for additional 3 h. Sat. ammonium chloride solution was added and the mixture was extracted with successive portions of ethyl acetate. The combined organic layer was dried (Na 2 filtered and the filtrate concentrated in vacuo. The residue was purified by MPLC on silica gel using EtOAc/hexanes as an eluent to give the desired aldehyde as an oil: 'H NMR (300 MHz, CDC1 3 d 9.75 1H), 6.92 (m, 4H), 4.60 1H), 3.35 2H, J 1.40 Hz), 3.17 4H), 2.72 (m, 4H), 1.34 6H, J 6.03 Hz); MS m/z 295 (MH+ of hemiacetal in MeOH).

Example 0 HO O N N NLJ1 N 0 Cpd. To a solution of LDA (1.6 mL, 2.5 mmol, 1.5 M solution in THF) in THF (20.0 mL) at -78 *C under N, was added slowly compound 34 (382 mg, 2.5 mmol) in THF (5.0 mL) and the mixture was stirred at this 54 temperature for 1 h. A solution of 1 2 -oxopropyl]-2-piperidone (645 mg, 2.5 Mmol) in THF (5 mL) was added and the resulting mixture was stirred at -78 °C under N 2 for 3 h. The mixture was stirred for an additional 3 h at room temperature, sat. ammonium chloride solution was added and the resulting mixture was extracted with successive portions of ethyl acetate. The combined organic layer was dried (NazSO 4 filtered and the filtrate concentrated in vacuo. The residue was purified by MPLC on silica gel using 3% MeOH in CH 2 Cl 2 as an eluent to give the compound 35 as an oil: 'H NMR (300 MHz, CDC1 3 d 6.91 4H), 4.59 1H), 4.30 1H, J 7.64 Hz), 4.21 (m, 1H), 4.15 1H, J 7.70 Hz), 3.32 2H), 3.11 4H), 2.82 (m, 2H), 2.60 4H), 2.43 4H), 1.86 4H), 1.34 6H, J= 6.05 Hz); MS m/z 418 The activity of compound 35 in the ala, calb and alc screens was 28, >10000 and 253 nm respectively.

Example 36 0 N N 0 Cpd. 36 Methanesulfonyl chloride (62.7 mM, 0.8 mmol), triethylamine (0.2 mL, 1.1 mmol) and DMAP (3.3 mg, 0.03 mmol) were added to a solution of compound 35 (225 mg, 0.5 mmol) in dichloromethane (15.0 mL) and the mixture was stirred at room temperature under Nz for overnight. The resulting mixture was washed with successive portions of water and the combined organic layer was dried (Na 2

SO

4 filtered and the filtrate was concentrated in vacuo. The residue was purified by MPLC on silica gel using 3-5% MeOH in CH 2 C12 to afford compound 36 as oil: 1 H NMR (300 MHz, CDC1 3 d 6.92 4H), 6.88 1H), 6.36 1H, J 16.1 Hz), 4.61 1H), 4.39 2H), 3.30 (bs, 2H), 55 3.23 2H, J 4.8 Hz), 3.14 (bs, 4H) 2.66 (bs, 4H), 2.44 2H), 1.87 4H), 1.36 6H, J J= 6.06 Hz); MS m/z 400 The activity of compound 36 in the la, alb and alc. screens was 18, 5316 and 602 nm respectively.

Example 37 0 OH OH N? S-N N L J 0 Cpd. 37 Sodium boron hydride (23 mg, 0.6 mmol) was added to a solution of compound 2 (125 mg, 0.3 mmol) in methanol (8.0 mL) at 0 °C under Nz and the mixture was stirred at room temperature for overnight.

Solvent was removed under reduced pressure and the residue was dissolved in ethyl acetate and washed with successive portions of water. The combined organic layer was dried (Na 2

SO

4 filtered and the filtrate was concentrated in vacuo to afford the title compound as a solid without further purification: 'H NMR (300 MHz, CDC1 3 d 6.91 4H), 4.59 1H), 4.14 1H), 3.57 1H), 3.42 4H), 3.13 (bs, 5H), 2.86 1H), 2.66 2H), 2.42 6H), 1.81 (m, 1.58 1H), 1.34 6H, J 6.06 Hz). The activity of compound 37 in the xla, alb and alc screens was 53, >10000 and 224 nm respectively.

BIOLOGICAL EXAMPLES Biological activity and selectivity of compounds of the invention was demonstrated by the following in vitro assays. The first assay tested the ability of compounds of Formula I to bind to membrane bound receptors al.-AR, Clb-AR and cld-AR.

56 Example 38 The DNA sequences of the three cloned human xl-AR subtypes have been published. Furthermore, the cloned cDNAs have been expressed both transiently in COS cells and stably in a variety of mammalian cell lines (HeLa, LM(tk-), CHO, rat -1 fibroblast) and have been shown to retain radioligand binding activity and the ability to couple to phosphoinositide hydrolysis. We used published

DNA

sequence information to design primers for use in RT-PCR amplification of each subtype to obtain cloned cDNAs. Human poly A+ RNA was obtained from commercially available sources and included hippocampus and prostate samples, sources which have been .cited in the literature. For the primary screen a radio ligand binding assay was used which employed membrane preparations from cells expressing the individual cloned receptor cDNAs. Radiolabeled ligands with binding activity on all three subtypes (non-selective) are commercially available ([125I]-HEAT, 3 H]-prazosin).

Each al receptor subtype was cloned from poly A+ RNA by the standard method of reverse transcription-polymerase chain reaction (RT-PCR). The following sources of polyA+ RNA were used for the cloning of the al receptor subtypes: al.-AR, human hippocampus and prostate, Olb-AR, human hippocampus, al,-AR, human hippocampus. The resulting cDNAs were cloned into the pcDNA3 mammalian expression vector (Invitrogen Corp., San Diego CA). Each DNA was sequenced for verification and to detect any possible mutations introduced during 2 the amplification process. Any deviation in sequence from the published consensus for each receptor subtype was corrected by sitedirected mutagenesis.

The three al-AR subtypes b, d) were transfected into COS cells using a standard DEAE-dextran procedure with a chloroquine shock. In this procedure, each tissue culture dish (100mm) was inoculated with 3.5 x 106 cells and transfected with 10 gg of DNA.

Approximately 72 hours post-transfection, the cells were harvested and COS membranes were prepared. Transfected COS cells from 25 plates 57 (100mm) were scraped and suspended in 15mL of TE buffer (50mM Tris- HC1, 5mM EDTA, pH7.4). The suspension was disrupted with a homogenizer. It was then centrifuged at 1000xg for 10 minutes at 4 The supernatant was centrifuged at 3 4 ,500xg for 20 minutes at 4 The pellet was resuspended in 5mL TNE buffer (50mM Tris-HCl, EDTA, 150mM Nacl, pH7.4). The resulting membrane preparation was aliquoted and stored at -70*C. The protein concentration was determined following membrane solubilization with TritonX-100.

The ability of each compound to bind to each of the al-AR subtypes was assessed in a receptor binding assay. [125I]-HEAT, a non-selective al-AR ligand, was used as the radiolabeled ligand.

Each well of a 96-well plate received: 140 pL TNE, 25 uL (125I]-HEAT diluted in TNE (50,000 cpm; final concentration 50 pM), 10 pL test compound diluted in DMSO (final concentration 1 pM-10 pM), 25 mL COS cell membrane preparation expressing one of the three al-AR subtypes (0.05-0.2 mg membrane protein). The plate was incubated for 1 hour at room temperature and the reaction mixtures were filtered through a Packard GF/C Unifilter filter plate. The filter plate was dried for 1 hour in a vacuum oven. Scintillation fluid (25 mL) was added to each well, and the filter plate was counted in a Packard Topcount scintillation counter. Data was analyzed using GraphPad Prism software.

Tables A -J list the IC5 0 values expressed in nanomolar concentration for select compounds of the invention in all receptor subtypes.

58 R2

N-N%

Table A C od# R, R, B 3 R B Z la (x1b a~ld Scheme 3 '7rpy

(CH

2 3 2.1 3915 177 1 3 3 H I-propyl H CH 3 .0

(CH

2 3 8.8 642 130 1 Table B Cd R 3 B z cL1a Olb (x1d Scheme 4 H 1-Propyl H 0 (CHZ) 3 79 >10000 >10000 15 Dd Ri R, RTable

C

Cd 1 H ~B z o~1a cxlb a1d Scheme 12 H j-Propyl H 0 (CH2) 4643 >10000 >10000 3 34 H i-propylH 0

(CH

2 2 29597 >10000 >10000 3 H ;L-propyl H 0

(CH

2 1 6933 >10000 >10000 3 51 H '-propylo 0 IID* 163 >10000 >8385 3 52 H j'-p ropyl 0 0 CPDA** 595 >10000 >8285 3 IID is lH-isoindole-1,3C2H)dion-i-yl **CPDA is 1, 1-cyclopentanedia cetimid -l--yl 59

R

2 0 0-N

R

3 Table D Cd# RI R,

R

3 B z a~la a~lb i* She 283 H 1- Propyl H 0 (CH) 2 2.2 595 131 7 3 H.I-PrOpyl H 0 3 6.3 >10000 215 7 37 H phenyl H 0

(CH

2 3 56 >10000 6 3 H phnl H 0

(CH

2 2 30 4410 341 7 39 H pheniyl H 0

(CH

2 172 >10000 570 7

R

2 0 RiN,

N'

Cpd# RTable,

E

Bpd 7. cR 3 B I al ibd Scheme 54 n CH 3 H 0i

ICH

2 3 1732 3022 530 0 4 41 H CH 3 H 0

CH

2 7628 3167 1684 4 42 H CHi, H 0

(CH

2 4 8589 1419 526 4 43 H CH,3 H 0 (CH2) 2 7723 2644 1565 4 44 H CH3 H o

(CH

2 5 2030 3937 577 4 19 H i-propyl .H 0 (CHz))2 258 12360 454 4 H i-propyl 0 0

(CH

2 1 98 96 197 4 *46 H i-propyl 0 0 (CH2) 2 69 1753 174 4 47 H ~-Propyl Ph 0

(CH

2 1 147 3318 291 4 153 H i-propyl 0 0 CPDA 147 3318 291 4 6o Table F Cpd# R, R,

R

3 B I la oaib c~ld Scheme i -propy1 0 (CH 2 3 3. 5 4.-4 56 272 2 Cpd# P.Table

G

Cpd# R, RH B z O~la alb culd Scheme 9 ~prpy H 0 (CHz) 3 8 9 10000 1517 2 Table

H

23d# 1 i H, 0 cxla alb cld Scheme 1 C22 H CH, HOE 0HCH) 80 >10000 46 1 48 H C 3 CO E

CH

2 2 23 1188 30 6 48 H CH, H 0

(CH

2 1 29 1002 49 H ClH, H 0 (CM 2 37 >10000 24 SO H CH3

CH

2 0H H

(CH

2 3 838 >5139 261 6 61 Table I Cpd# R R- R3 B Z ala alb aid Scheme 16 H i-propyl H 0 1.88 8502 211 3 17 H i-propyl H O (CHz) 2 2.5 3470 79 3

R

2 0 R, \N N Rz R3 Table J d# R2 R 3 B Z ala alib aild Scheme 32 H L-propyl H 0

(CH

2 2 0.83 620 24 8 H i-propyl H 0

(CH

2 1.0 768 185 8 56 H i-propyl H 0

(CH

2 4 3.7 1230 95 8 Example 39 The antagonist activity and the selectivity of compounds of the invention for prostate tissues over aortic tissues as well as their antagonists was demonstrated as follows. The contractile responses of rat prostatic tissue and rat aorta tissues were examined in the presence and absence of antagonist compounds. As an indication of the selectivity of antagonism, test compound effects on vascular smooth muscle contractility (alb-AR and ald-AR) were compared to the effects on prostatic smooth muscle Strips of prostatic tissue and aortic rings were obtained from Long Evans derived male rats weighing 275 grams and sacrificed by cervical dislocation. The 62 prostate tissue was placed under 1 gram tension in a 10 ml bath containing phosphate buffered saline pH 7.4 at 32 0 C and isometric tension was measured with force transducers. The aortic tissue was placed under 2 grams tension in a 10 ml bath containing phosphate buffered saline pH 7.4 at 37 o C. The ability of test compound to reduce the norepinephrine-induced contractile response by 50 (IC 50 was determined. Compound 3 inhibited the contractile response in 0 aortic tissue with an IC 50 of 31.9 pM and in prostate tissue with an ICs 0 of 1.3 pM. Compound 16 inhibited the contractile response in aortic tissue with an IC 50 of 13.5 pM and in prostate tissue with an

IC

0 o of 0.38 pM.

Example Compound 3 was tested for its ability to antagonize phenylephrine (PE) induced increases in intraurethral pressure in dogs. The selectivity of the compound was demonstrated by comparing their effect upon PE induced increases in mean arterial pressure (MAP) in the dog.

Male beagle dogs were anesthetized and catheterized to measure intraurethral pressure (IUP) in the prostatic urethra. Mean arterial pressure (MAP) was measured using a catheter placed in the femoral artery. Dogs were initially administered six i.v. bolus doses (1 to S 3 2mg/kg) of phenylephrine (PE) to establish a control agonist doseresponse curve. IUP and MAP were recorded following each dose until the IUP returned to baseline. The dogs then were given an i.v. bolus dose of the antagonist compound, followed by i.v. PE challenges of ascending doses, as in the control agonist dose-response curve.

IUP

and MAP measurements following each PE challenge were recorded. The antagonist compound was tested over a dose range of 3 to 300 ug/kg in half-log increments. The interval between antagonist doses was at least 45 minutes and three experiments were performed per dose level for each test compound. The graphs below illustrates the mean percentage reductions in IUP and MAP for compound 3.

-63-

O

Z 100- 00 90- IUP S 80-

MAP

o CK Iu so- .F ca SS mf 0- 0 o S0.1 1.0 10.0 100.0 1000.0 Dose (ug/kg, i.v.) Effects of Compound 3 upon IUP and MAP at 10ig/kg PE dogs

REFERENCES

Breslin D, Fields DW, Chou T-C, Marion DN, Kane M, Vaughan ED, and Felsen D (1993) Medical management of benign prostatic hyperplasia: a canine model comparing the in vivo efficacy ofalpha-1 adrenergic antagonists in the prostate. J. Urol. 149: 395-399.

Bruno JF, Whittaker J, Song J, and Berelowitz M. (1991) Molecular cloning and sequencing of a cDNA encoding a human alA adrenergic receptor. Biochem. Biophys.

Res. Commun. 170: 1485-1490.

Bylund DB, Eikenberg DC, Hieble JP, Langer SZ, Lefkowitz RJ, Minneman KP, Molinoff PB, Ruffolo RR, and Trendelenburg U (1994) IV. International Union of Pharmacology nomenclature of adrenoceptors. Pharmacol. Rev. 46: 121-136.

Carruthers SG (1994) Adverse effects of al-adrenergic blocking drugs. Drug Safety 11: 12-20.

n -64-

O

C, Faure C, Gouhier C, Langer SZ, and Graham D (1995) Quantification of aladrenoceptor subtypes in human tissues by competitive RT-PCR analysis. Biochem.

Z Biophys. Res. Commun. 213: 935-943.

00 Flavahan NA and VanHoutte PM (1986) a -Adrenoceptor subclassification in vascular smooth muscle. Trends Pharmacol. Sci. 7: 347-349.

SFord APDW, Arredondo NF, Blue DR, Bonhaus DW, Jasper J Kava MS, Lesnick J, C Pfister JR, Shieh IA, Vimont RL, Williams TJ, McNeal JE, Stamey TA, and Clarke DE 0 (1996) RS-17053 (N-[2-(2-Cyclopropylmethoxyphenoxy)ethyl]-5-chloro-a, a-dimethyl- C 1H-indole-3-ethanamine hydrochloride), a selective alA-adrenoceptor antagonist, displays low affinity for functional al-adrenoceptors in human prostate: Implications for adrenoceptor classification. Mol. Pharmacol. 49: 209-215.

Forray C, Bard JA, Wetzel JM, Chiu G, Shapiro E, Tang R, Lepor H, Hartig PR, Weinshank RL, Branchek TA, and Gluchowski C (1994) The al-adrenergic receptor that mediates smooth muscle contraction in human prostate has the pharmacological properties of the cloned human alc subtype. Mol. Pharmacol. 45: 703-708.

Gormley G, Stoner E, Bruskewitz RC et al. (1992) The effect of finasteride in men with benign prostatic hyperplasia. N. Engl. J. Med. 327: 1185-1191.

Hatano A, Takahashi H, Tamaki M, Komeyama T, Koizumi T, and Takeda M (1994) Pharmacological evidence of distinct a 1-adrenoceptor subtypes mediating the contraction of human prostatic urethra and peripheral artery. Br. J. Pharmacol.

113: 723-728.

Harrison JK, Pearson WR, and Lynch KR (1991) Molecular characterization of al- and a2-adrenoceptors. Trends Pharmacol. Sci. 12: 62-67.

Hieble JP and Caine M.(1986) Etiology of benign prostatic hyperplasia and approaches to pharmacological management. Fed. Proc. 45: 2601-2603.

n

O

"1 Hirasawa A, Horie K, Tanaka T, Takagaki K, Murai M, Yano J, and Tsujimoto G (1993) Cloning, functional expression and tissue distribution of human cDNA for the alc- Z adrenergic receptor. Biochem. Biophys. Res. Commun. 195: 902-909.

00 Holck MI, Jones CHM, and Haeusler G (1983) Differential interactions of clonidine and methoxamine with postsynaptic a-adrenoceptors of rabbit main pulmonary artery.

J. Cardiovasc. Pharm. 5: 240-248.

CI Lepor H and Rigaud G (1990) The efficacy of transurethral resection of the prostate in Smen with moderate symptoms ofprostatism. J. Urol. 143: 533-537.

Lepor H, Auerback S, Puras-Baez A et al. (1992) A randomized, placebo-controlled multicenter study of the efficacy and safety of terazosin in the treatment of benign prostatic hyperplasia. J. Urol. 148: 1467-1474.

Lepor H (1995) a-Blockade for benign prostatic hyperplasia (BPH) J. Clin. Endocrinol.

Metab. 80: 750-753.

Marshall I, Burt RP, Andersson PO, Chapple CR, Greengrass PM, Johnson GI, and Wyllie MG (1992) Human alc-adrenoceptor: functional characterization in prostate.

Br. J. Pharmacol. 112: 107 (Proc. Suppl. Dec.): 327P.

Marshall I, Burt RP, and Chapple CR (1995) Noradrenaline contraction of human prostate mediated by cxlA-(al c-)adrenoceptor subtype. Br. J. Pharmacol. 115: 781-786.

Mebust WK, Holtgrewe HL, Cockett ATK, and Peters PC (1989) Transurethral prostatectomy: immediate and postoperative complications. A cooperative study of 13 participating institutions evaluating 3,885 patients. J. Urol., 141: 243-247.

Minneman KP, Han C and Abel PW (1988) Comparison of al-adrenergic receptor subtypes distinguished by chloroethylclonidine and WB4101. Mol. Pharmacol.

33: 509-514.

Minneman KP and Esbenshade TA (1994) al-Adrenergic receptor subtypes. Annu.

Rev. Pharmacol. Toxicol. 34: 117-133.

i_ nt -66-

O

Morrow AL and Creese I (1986) Characterization of al-adrenergic receptor subtypes in rat brain: A reevaluation of [3H]WB4104 and [3H]prazosin binding. Mol. Pharmacol.

S29: 321-330.

00 Muramatsu I (1992) A pharmacological perspective of al-adrenoceptors: subclassification and functional aspects, in a-Adrenoceptors (Fujiwara M, Sugimoto T, N and Kogure K, eds.). Excerpta Medica Ltd., Tokyo, 193-202.

CN Muramatsu I, Oshita M, Ohmura T, Kigoshi S, Akino H, Gobara M, and Okada K (1994) 0 Pharmacological characterization of al-adrenoceptor subtypes in the human prostate: C N functional and binding studies. Br. J. Urol. 74:572-577.

Oesterling JE (1995) Benign prostatic hyperplasia. Medical and minimally invasive treatment options. N. Engl. J. Med. 332: 99-109.

Price DT, Lefkowitz RJ, Caron MG, Berkowitz D, and Schwinn DA (1994) Localization of mRNA for three distinct al-adrenergic receptor subtypes in human tissues: implications for human a-adrenergic physiology. Mol. Pharmacol. 45: 171-175.

Ramarao CS, Kincade Denker JM, Perez DM, Gaivin RJ, Riek RP, and Graham RM (1992) Genomic organization and expression of the human oclB-adrenergic receptor. J.

Biol. Chem. 267: 21936-21945.

Schwinn DA, Johnston GI, Page SO, Mosley MJ, Wilson KH, Worman NP, Campbell S, Fidock, MD, Furness LM, Parry-Smith DJ, Peter B, and Bailey DS (1995) Cloning and pharmacological characterization of human alpha-1 adrenergic receptors: sequence corrections and direct comparison with other species homologues. JPET 272: 134-142.

Weinberg DH, Trivedi P, Tan CP, Mitra S, Perkins-Barrow A, Borkowski D, Strader CD, and Bayne M (1994) Cloning, expression and characterization of human a adrenergic receptors alA, alB, and alC. Biochem. Biophys. Res. Commun.

201: 1296-1304.

Weis KA, Epstein RS, Huse DM, Deverka PA and Oster G (1993) The costs of prostatectomy for benign prostatic hyperplasia. Prostate 22: 325-334.

n -67- Wennberg JE, Roos N, Sola L, Schori A, and Jaffe R (1987) Use of claims data systems to evaluate health care outcomes: mortality and reoperation following prostatectomy.

O

Z JAMA 257: 933-936.

00 Yamada S, Tanaka C, Kimura R, and Kawabe K (1994) Alpha 1-adrenoceptors in human prostate: characterization and binding characteristics of alpha 1-antagonists. Life Sci.

(N 54: 1845-1854.

Claims (17)

1. 2. The compounds of claim 1, where R, is hydrogen or CI. 6 alkyl, Z is (CH 2 n is 1 and A is 0 0 F-rN\ NH 2 N N R 4 N N N S OH N N SH N N R 4 -N -N
2. 3. The compounds of claim 2, where A is NH 2 0 -N N N R 4 -N 7N N R 4 -N N in -71- O c- 4. The compounds of claim 1, where R 1 is hydrogen, R 2 is Cl- 6 alkyl, phenyl or Ssubstituted phenyl, R 3 is hydrogen, R 4 is hydrogen, B is oxygen, Z is (CH 2 n is 1, and SA is R4 N o N N0S Ce or N 5 5. A compound and pharmaceutically acceptable salts thereof selected from the group Sconsisting of 0 0 N N N O 0 0 N 0N -/NH N 0 tn -72- o0 N H 2 N 0 00 and 0- O N N 0 N
3. 6. A pharmaceutical composition comprising a compound according to claim 1 and a pharmaceutically acceptable carrier or diluent.
4. 7. A pharmaceutical composition comprising a compound according to claim 5 and a pharmaceutically acceptable carrier or diluent.
5. 8. A medicament useful in treating a patient afflicted with a disease mediated by the a- a adrenergic receptor comprising an effective dose of a compound of claim 1. tn -73- O C1 9. The medicament of claim 8 comprising an effective dose of 0.01-100 mg/kg daily O and of a compound of claim 5, where the disease mediated by the c-la adrenergic Z receptor is benign prostatic hyperplasia. 00 The medicament of claim 9, where the effective dose is 0.05-1.0 mg/kg daily. Ci 5 11. A compound of Formula II R2 6' O c-i 0 E Ri N N R1 IH II wherein R 1 is hydrogen, halogen, C-_salkoxy, hydroxyl, or Cl-6alkyl; R 2 is Ci-6alkyl, substituted Ci- 6 alkyl where the alkyl substituents are one or more halogens, phenyl, substituted phenyl where the phenyl substituents are independently selected from one or more of the group consisting of Ci.lalkyl, Ci.-alkoxy, and trihaloC-.salkyl, phenylC-_ 5 alkyl, or substituted phenylCi-salkyl where the phenyl substituents are independently selected from one or more of the group consisting of Cisalkyl, halogen, Cl-salkoxy, and trihaloC-lsalkyl; E is oxygen or N-OH.
6. 12. The compound of claim 11, where Ri is hydrogen or Cl_ 6 alkyl, R 2 is Ci. 6 alkyl, phenyl, or substituted phenyl where the phenyl substituents are independently selected from one or more of the group -74- consisting Of Ci.. 5 alkyl, CI.. 5 alkoxy, and o trihaloCi- 5 alkyl. 0C) 13. A: compound of Formula III 0 R, N N Q- R 7 wherein: R, is hydrogen, halogen, CI.. 5 alkoxy, hydroxyl, or C1- 6 alkyl; R(2 is C i 6 alkyl, substituted C i- 6 alkyl where the alkyl substituents are one or more halogens, phenyl, substituted phenyl where the phenyl substituents are independently selected from one or more of the group consisting Of C1- 5 alkyl, CI.. 5 alkoxy, and trihaloC i 5 alkyl, phenylCi 5 alkyl, or substituted phenylC I 5 alkyl where the phenyl substituents are independently selected from one or more of the group consisting of C 1 -5alkyl, halogen, C 1 5 alkoxy, and trihaloC I 5 alkyl; R 7 is formyl, halomethyl, hydroxymethyl, t-butyldiphenylsilyloxymethyl, C I. 6 alkoxycarbonyl, and carboxy; and Q is selected from the group consisting of S Oor M where the points of attachment are depicted by the hashed bonds, where one point of attachment is bonded to the methylene adjacent to the depicted piperazine and the second point of attachment is bonded to R 7
7. 14. The compound of claim 13, where R 1 is hydrogen or Cl-6alkyl, R 2 is Ci.6alkyl, phenyl, or substituted phenyl where the phenyl substituents are independently selected from one or more of the group consisting of C. 5 alkyl, Ci-salkoxy, and trihaloCi-salkyl.
8. 15. A method of treating a disease mediated by the a- a adrenergic receptor comprising administering a therapeutically effective amount of a compound of claim 1 to a subject in need thereof.
9. 16. The method of claim 15, wherein the compound is administered in an effective dose of 0.01-100 mg/kg daily in combination with a compound of claim 5, where the disease mediated by the a-la adrenergic receptor is benign prostatic hyperplasia.
10. 17. The method of claim 16, where the effective dose is 0.05-1.0 mg/kg daily.
11. 18. Use of a compound according to claim 1 in the manufacture of a medicament for treating a disease mediated by the a-1 a adrenergic receptor. tn -76- N 19. Use according to claim 18, wherein the medicament is intended to be administered >at a dose of 0.01-100 mg/kg daily in combination with a compound of claim 5, where the 0 Z disease mediated by the a- a adrenergic receptor is benign prostatic hyperplasia. 00 Use according to claim 19, where the medicament is intended to be administered at a dose of 0.05-1.0 mg/kg daily. (Ni
12. 21. A compound of formula I or a pharmaceutically acceptable salt thereof, substantially as herein described with reference to any one of the examples but excluding comparative examples.
13. 22. A pharmaceutical composition comprising a compound of formula I, substantially as herein described with reference to any one of the examples but excluding comparative examples.
14. 23. A medicament useful in treating a patient afflicted with a disease mediated by the a-1 a adrenergic receptor, substantially as herein described with reference to any one of the examples but excluding comparative examples.
15. 24. A compound of formula II or a pharmaceutically acceptable salt thereof, substantially as herein described with reference to any one of the examples but excluding comparative examples. A compound of formula III or a pharmaceutically acceptable salt thereof, substantially as herein described with reference to any one of the examples but excluding comparative examples.
16. 26. A method of treating a disease mediated by the a- 1 a adrenergic receptor comprising administering a compound of formula I or a pharmaceutically acceptable salt thereof, substantially as herein described with reference to any one of the examples but excluding comparative examples. tm -77-
17. 27. Use of a compound of formula I or a pharmaceutically acceptable salt thereof in Sthe manufacture of a medicament, substantially as herein described with reference to any O Z one of the examples but excluding comparative examples. 00 DATED this 18th day of November 2005 Shelston IP C Attorneys for: ORTHO-MCNEIL PHARMACEUTICAL, INC.