Classifications

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  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
  • C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D317/46—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
  • C07D317/48—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring
  • C07D317/62—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to atoms of the carbocyclic ring
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
  • C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
  • C07D211/36—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D211/56—Nitrogen atoms
  • C07D211/58—Nitrogen atoms attached in position 4
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  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
  • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
  • C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
  • C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
  • C07D239/32—One oxygen, sulfur or nitrogen atom
  • C07D239/34—One oxygen atom
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
  • C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
  • C07D295/08—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms
  • C07D295/084—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms with the ring nitrogen atoms and the oxygen or sulfur atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings
  • C07D295/088—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms with the ring nitrogen atoms and the oxygen or sulfur atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings to an acyclic saturated chain
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
  • C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
  • C07D295/08—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms
  • C07D295/096—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms with the ring nitrogen atoms and the oxygen or sulfur atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
  • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
  • C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
  • C07D311/68—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with nitrogen atoms directly attached in position 4
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
  • C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D317/46—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
  • C07D317/48—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring
  • C07D317/50—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to atoms of the carbocyclic ring
  • C07D317/58—Radicals substituted by nitrogen atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
  • C07B2200/00—Indexing scheme relating to specific properties of organic compounds
  • C07B2200/07—Optical isomers
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2601/00—Systems containing only non-condensed rings
  • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
  • C07C2601/14—The ring being saturated
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2602/00—Systems containing two condensed rings
  • C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
  • C07C2602/04—One of the condensed rings being a six-membered aromatic ring
  • C07C2602/08—One of the condensed rings being a six-membered aromatic ring the other ring being five-membered, e.g. indane
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2602/00—Systems containing two condensed rings
  • C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
  • C07C2602/04—One of the condensed rings being a six-membered aromatic ring
  • C07C2602/10—One of the condensed rings being a six-membered aromatic ring the other ring being six-membered, e.g. tetraline
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2602/00—Systems containing two condensed rings
  • C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
  • C07C2602/04—One of the condensed rings being a six-membered aromatic ring
  • C07C2602/12—One of the condensed rings being a six-membered aromatic ring the other ring being at least seven-membered

Definitions

• the present invention relates to di-N-substituted piperazines and 1 ,4-di-substituted piperidines useful in the treatment of cognitive disorders, pharmaceutical compositions containing the compounds, methods of treatment using the compounds, and to the use of said compounds in combination with acetylcholinesterase inhibitors.
• the present invention is predicated on the discovery of a class of di-N-substituted piperazines and 1 ,4-di-substituted piperidines.
• Logemann ef al. (Brit. J. Pharmacol. (1961), 17, 286-296) describe certain di-N-substituted piperazines, but these are different from the inventive compounds of the present invention.
• the compounds of Logemann et al. are not disclosed to have activity against cognitive disorders.
• R-i is -X(CH 2 ) n Ar or -X(CH 2 ) n R 8 ;
• R 2 is H or Ar
• Pi is -X(CH 2 ) n R 8 ;
• P 2 is -X(CH 2 ) n R 8 or -XRgY;
• R ⁇ is H, alkyl, alkenyl, alkynyl, C0 2 H, C0 2 alkyl, or C0 2 Ar;
• Rg is alkyl, alkenyl or phenyl;
• R10 is H, alkyl (which may be substituted with C0 2 H, C0 2 alkyl or C0 2 (CH 2 ) n Ar), alkenyl, phenyl, OH, alkoxy, S(0) q alkyl, S(0) q alkenyl, S(0) q aryl, NH 2 , NHalkyI, N(alkyl) 2> F, Cl, Br, I, CF 3 , NHCHO, NHCOalkyI, -X(CH 2 ) n R 8 or -XRgY;
• X is (CH 2 ) n , O, NH, Nalkyl, or S(0) q ;
• Y is CH 3 or X(CH 2 ) n Ar
• Ar is a variety of substituted or unsubstituted heterocyclic and aromatic hydrocarbon groups, including piperidinyl and piperazinyl, which may carry substituents;
• Z-i and Z 2 are independently H, alkyl, alkenyl, alkynyl, OH, alkoxy, S(0) q alkyl, NH 2 , NHalkyI, N(alkyl) 2 , F, Cl, Br, I, CF 3 , NHCHO, NHCOalkyI, -X(CH 2 ) n R 8l phenyl, benzyl or cycloalkyl;
• ⁇ 3 is Zi or -XRgY; n is 0 or an integer from 1 to 6, and q is 0, 1 or 2; and the groups designated as 'alkyl', 'alkenyl', 'alkynyl' or 'phenyl' can all be substituted.
• the present invention relates to compounds according to the structural formula I,
• Z is N, CH or C-alkyl
• X is -0-, -S-, -SO-, -S0 2 - -CO-, -CH 2 - -CONR20- _NR20_so 2 -, -NR 20 CO- or -SO 2 -NR20_;
• Q is -0-, -S-, -SO-, -SOr-, or -CH2-;
• R is
• R 1 and R 21 are independently selected from the group consisting of hydrogen, alkyl, alkenyl, cycloalkyl, cycloalkenyl, cycloalkylalkyl, cycloalkenylalkyl, phenylalkyl, and hydroxyalkyl;
• R2 is cycloalkyl, cycloalkyl substituted with 1 to 3 independently selected R 3 groups, cycloalkenyl, cycloalkylalkyl,
• R 2 is R 3 -substituted-1-piperidinyl only when Z is CH or C— alkyl; or, when Z is
• R 2 may also be alkoxycarbonyl, -N(R 9 )(hydroxyalkyl) wherein R 9 is H, hydroxyalkyl, or alkyl, or -N(R 9 ) 2 wherein the two R 9 groups may be joined to form an alkylene group;
• R 3 , R 4 , R 5 , R 6 , R 22 , R 24 , and R25 are independently selected from the group consisting of H, alkyl, halo, alkoxy, benzyloxy, benzyloxy substituted by nitro or aminoalkyl, polyhaloalkyl, nitro, sulfonyl, hydroxy, amino, alkylamino, formyl, alkylthio, acyloxy, alkylsulfonyl, arylsulfonyl, acyl, alkoxycarbonyl, alkylsulfinyl, -OCONH 2 , -OCONH-alkyl, -OCON(alkyl) 2 , -NHCOO-alkyl,
• R 8 is hydrogen, lower alkyl or cyclopropyl
• R 0 is H, phenyl or alkyl
• R 7 and R 28 are independently selected from the group consisting of H, alkyl, hydroxyalkyl, alkoxyalkyl, arylalkyl, mercaptoalkyl, alkylthioalkyl, and carboxyalkyl, and additionally R 2 7 and R 28 may be joined to form an alkylene group; and n is 0 or an integer from 1 to 3.
• Another aspect of the invention is a pharmaceutical composition which comprises a compound having structural formula I as defined above, including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof, in combination with a pharmaceutically acceptable carrier.
• Another aspect of the invention is the use of a compound of formula I as defined above, including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof, for the preparation of a pharmaceutical composition useful in the treatment of cognitive disorders and neurodegenerative diseases such as Alzheimer's disease.
• Yet another aspect of the invention comprises a method for making a pharmaceutical composition
• a method for making a pharmaceutical composition comprising mixing a compound of formula I as defined above, including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof, with a pharmaceutically acceptable carrier.
• Another aspect of this invention is a method for treating a cognitive or neurodegenerative disease comprising administering to a patient suffering from said disease an effective amount of a compound of formula I as defined above, including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof.
• Another aspect of this invention is a method for treating cognitive and neurodegenerative diseases, such as Alzheimer's disease, with a compound of formula I as defined above, including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof, in combination with an acetylcholinesterase inhibitor.
• Another aspect of this invention is a method for treating a cognitive or neurodegenerative disease comprising administering to a patient suffering from said disease an effective amount of a combination of a compound of formula I as defined above, including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof, said compound being capable of enhancing acetylcholine release (and being preferably an m2 or m4 selective muscarinic antagonist), together with an acetylcholinesterase inhibitor.
• kits comprising in separate containers in a single package pharmaceutical compounds for use in combination to treat cognitive disorders, wherein one container contains a compound of formula I as defined above, including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof, said compound being capable of enhancing acetylcholine release (and preferably being an m2 or m4 selective muscarinic antagonist) in a pharmaceutically acceptable carrier, and a second container contains an acetylcholinesterase inhibitor in a pharmaceutically acceptable carrier, the combined quantities being an effective amount.
• a compound of formula I as defined above including stereoisomers, pharmaceutically acceptable salts, esters, and solvates thereof, said compound being capable of enhancing acetylcholine release (and preferably being an m2 or m4 selective muscarinic antagonist) in a pharmaceutically acceptable carrier
• a second container contains an acetylcholinesterase inhibitor in a pharmaceutically acceptable carrier, the combined quantities being an effective amount.
• Z is N.
• n is 1 or 2 or especially 0.
• X is SO or especially O or S0 2 .
• R 8 is H or methyl.
• R is
• R 5 and R 6 are H, CH 3 , nitro, NH 2 , acetylamino, or methoxy
• X is preferably O, SO or S0 2
• R 3 and R 4 are H
• R 1 is H, cycloalkyl, cycloalkylalkyl or alkyl
• R 21 is H.
• R 3 and R 4 are H, and R 1 is H, cycloalkyl or alkyl and R 21 is H.
• R 1 is preferably H, CH 3 or cyclohexylmethyl, and R 2 is cyclohexyl.
• R 3 and R 4 are H, X is O, SO or S0 2 , and R 1 is H, cycloalkyl or alkyl and R 21 is H. R 1 is preferably H or CH 3 .
• At least one of R 27 and R 28 is alkyl.
• at least one of R 27 and R 28 is alkyl and the other is H or alkyl; more preferably, one of R 27 and R 28 is methyl and the other is hydrogen.
• R is 4-methoxyphenyl
• R is a phenyl group, which may be substituted with nitro or especially with methoxy, where each of these groups is preferably in the 4-position, or in particular a 2-pyrimidinyl group;
• X is S, SO, or especially S0 2 or O;
• Q is O or especially CH 2 ; n is 1 or 2 or especially 0; R 1 is H and R 21 is cyclohexylmethyl;
• R 27 and R 28 are CH 3 or especially H
• R 2 is cyclohexyl or 1 -piperidinyl. Except where stated otherwise the following definitions apply throughout the present specification and claims. These definitions apply whether a term is used by itself or in combination with other terms. For example, the definition of “alkyl” applies not only to “alkyl” but also to the “alkyl” portions of “alkoxy”, “polyhaloalkyl”, etc.
• Alkyl represents a straight or branched saturated hydrocarbon chain having 1 to 20 carbon atoms, preferably 1 to 8 carbon atoms.
• a 'lower alkyl' group has 1 to 6 carbon atoms, preferably 1 to 4 carbon atoms.
• Alkenyl represents a straight or branched hydrocarbon chain of from 3 to 15 carbon atoms, more preferably 3 to 12 carbon atoms, having at least one carbon-to-carbon double bond but the free valency at least one carbon atom removed from the double bond.
• Cycloalkyl represents a saturated carbocyclic ring having 3 to 12 carbon atoms.
• Cycloalkenyl represents a carbocyclic ring having from 5 to 8 carbon atoms and at least one carbon-to-carbon double bond in the ring.
• Acyl represents a radical of a carboxylic acid and thus includes groups of the formula Alkyl-CO-, Aryl-CO-, Aralkyl-CO-, Cycloalkyl-CO-, wherein the various hydrocarbon radicals are as defined in this section.
• Halo represents fluoro, chloro, bromo or iodo.
• Aryl represents phenyl or naphthyl, each of which may be substituted with one to three groups R c selected from halo, alkyl, hydroxy, alkoxy, phenoxy, amino, alkylamino and dialkylamino groups.
• Preferred aryl groups are phenyl, substituted phenyl, 1 -naphthyl, 2-naphthyl and indanyl groups.
• Heteroaryl represents a cyclic group having at least one O, S and/or N interrupting a carbocyclic ring structure and having a sufficient number of pi electrons to provide aromatic character.
• the aromatic heterocyclic group preferably has from 2 to 14, especially from 3 to 9 carbon atoms, e.g., 2-, 3- or 4-pyridyl, 2- or 3-furyl, 2- or 3-thienyl, 2-, 4- or 5-thiazolyl, 2-, 4- or 5-imidazolyl, 4-, 5- or especially 2-pyrimidinyl, 2-pyrazinyl, 3- or 4-pyridazinyl, 3-, 5- or
• heteroaryl groups include 2-, 3- or 4-pyridyl, 2- or 3-furyl, 2- or 3-thienyl, 2-, 4- or 5-imidazolyl, and 7-indolyl.
• Polyhalo indicates substitution of at least 2 halo atoms in the group modified by the term "polyhalo".
• Sulfonyl represents a group of the formula -SO ⁇ .
• Sulfinyl represents a group of the formula -SO-.
• Alkylene represents a straight or branched saturated hydrocarbon chain having 1 to 20 carbon atoms, preferably 1 to 8 carbon atoms, and two free valencies, which for the purpose of this invention are not on the same carbon atom when the alkylene group has 2 to 20 carbon atoms.
• Preferred alkylene groups are methylene or polymethylene groups of the formula -(CH 2 )( 2 . o)-.
• Compounds of this invention may exist in at least two stereoisomeric configurations based on the asymmetrically substituted carbon atom to which
• a compound of formula I can exist in unsolvated as well as solvated forms, including hydrated forms. In general, the forms that are solvated with pharmaceutically acceptable solvents such as water, ethanol and the like, are equivalent to the unsolvated forms for the purposes of this invention.
• a compound of formula I may form pharmaceutically acceptable salts with organic and inorganic acids. Examples of suitable acids for salt formation are hydrochloric, sulfuric, phosphoric, acetic, citric, malonic, salicylic, malic, fumaric, succinic, ascorbic, maleic, methanesulfonic and other mineral and carboxylic acids well known to those skilled in the art.
• a salt is prepared by contacting a free base form with a sufficient amount of the desired acid to produce a salt in the conventional manner.
• the free base form may be regenerated by treating the salt with a suitable dilute aqueous base such as dilute aqueous sodium hydroxide, potassium carbonate, ammonia or sodium bicarbonate.
• a suitable dilute aqueous base such as dilute aqueous sodium hydroxide, potassium carbonate, ammonia or sodium bicarbonate.
• the free bases differ from the corresponding salts somewhat in certain physical properties, such as solubility in polar solvents, but the salts are otherwise equivalent to the corresponding free bases for purposes of the invention.
• L 1 and L 2 are groups that can be eliminated during the reaction.
• L 2 is preferably a leaving group such as a halogen atom, especially bromine or fluorine
• L 1 is preferably an alkali metal, e.g., sodium or potassium.
• the reaction is carried out in an inert organic solvent, which is preferably anhydrous, e.g., DMSO, DMF, or a polar ether such as dimethoxyethane.
• Step (b) comprises the reduction of the carbonyl group to hydroxy- methylene with a reducing agent such as an aluminum hydride, e.g., lithium aluminum hydride, or a borohydride, e.g., sodium borohydride, in an inert organic solvent.
• a reducing agent such as an aluminum hydride, e.g., lithium aluminum hydride, or a borohydride, e.g., sodium borohydride, in an inert organic solvent.
• Step (c) comprises the conversion of the hydroxy group into a leaving group L 3 , e.g., a sulfonate ester group such as a group S0 3 -(lower alkyl) or with a halogen atom, especially bromine or iodine.
• a leaving group L 3 e.g., a sulfonate ester group such as a group S0 3 -(lower alkyl) or with a halogen atom, especially bromine or iodine.
• This conversion can be carried out with a sulfonyl chloride, e.g., methane-, ethane- or 4-toluene-sulfonylchloride, and an organic base, e.g., a tertiary amine such a pyridine or triethylamine; or with a halogenating agent, e.g., SOCI 2 or PBr 3) if desired with displacement of the resulting bromide by iodide when an iodide is required.
• a sulfonyl chloride e.g., methane-, ethane- or 4-toluene-sulfonylchloride
• an organic base e.g., a tertiary amine such a pyridine or triethylamine
• a halogenating agent e.g., SOCI 2 or PBr 3
• Step (d) comprises the amination of the reactive group L 3 , e.g. Cl, with a piperidine or piperazine to form the desired product of the formula I.
• This reaction can be carried out neat with the piperidine or piperazine or in an organic solvent, and an acid-binding agent can if desired be used.
• An excess of the piperidine or piperazine may serve both as acid-binding agent and as organic solvent.
• a piperazine When a piperazine is used, its second nitrogen atom can bind the acid liberated in the reaction and no extra acid-binding agent may be necessary.
• Step (e) can be carried out by condensation of the reactants in the presence of a basic catalyst, e.g, an amine such as piperidine. Under these circumstances an excess of the catalyst can serve as solvent.
• a basic catalyst e.g, an amine such as piperidine.
• the reaction can be effected in the presence of a strongly basic catalyst such as LDA (lithium diisopropylamide) or lithium HMDS (lithium hexamethyldisilazane), which preferably is added at a low temperature, e.g., -78°C to 0°C, in an inert anhydrous organic solvent such as THF or diethyl ether.
• LDA lithium diisopropylamide
• HMDS lithium hexamethyldisilazane
• the reaction with the aldehyde may then be effected at a low temperature, at room temperature or at moderately elevated temperature, e.g., at -78 to +60°C, preferably about 0 to +30°C, and under an inert atmosphere, e.g., nitrogen.
• a low temperature at room temperature or at moderately elevated temperature, e.g., at -78 to +60°C, preferably about 0 to +30°C, and under an inert atmosphere, e.g., nitrogen.
• R21A-CHO is used to introduce the group R ⁇ 1, then R 1A as one carbon atom fewer than R 21 such that R 21A -CH 2 is R 21 .
• Step (f) can then be dehydrated (for example, direct with acid or, after conversion of the hydroxy group into a leaving group, e.g., a halide or sulfonate, with base), and the resulting compound with a double bond can be hydrogenated, e.g. with hydrogen and a catalyst such as Pd C, to the compound of the formula A6.
• a leaving group e.g., a halide or sulfonate
• Step (f) can then be carried out by the methods of Steps (b) (reduction) and (c) (conversion of the hydroxy group into a leaving group L 3 ) above, and Step (g) by the method of Step (d) above. If it is desired to introduce a group R 1 in addition to R 21 , then the process of Step (e) can be repeated before Steps (f) and (g) are carried out.
• An alternative method for preparing compounds of the formulae A5 and A7 in Scheme A comprises the condensation of a compound of the formula A2 or A6 with a compound of the formula A4, followed by the reduction of the resulting condensation product, e.g., imine, preferably in the same step.
• the condensation can be effected in the presence of a compound or compounds serving as a mild Lewis acid (or a protic acid) and a dehydrating agent.
• the mild Lewis acid is conveniently a titanium tetra(lower alkoxide), especially Ti(0-2-Pr)4, which is commercially available and gives good results.
• the resulting condensation product (e.g., imine) can then be reduced with a mild reducing agent, e.g., a sodium borohydride, but preferably one that is not reactive towards the Lewis acid or protic acid, especially sodium cyanoborohydride.
• a mild reducing agent e.g., a sodium borohydride, but preferably one that is not reactive towards the Lewis acid or protic acid, especially sodium cyanoborohydride.
• the reaction can be effected with sodium triacetoxyborohydride as both Lewis acid and reducing agent, in the presence of acetic acid.
• condensation and reduction is carried out in the presence of an inert organic solvent, preferably a chlorinated hydrocarbon, e.g., 1 ,2-dichloroethane or especially methylene chloride.
• an inert organic solvent preferably a chlorinated hydrocarbon, e.g., 1 ,2-dichloroethane or especially methylene chloride.
• Step (a) the compound of the formula B1 (wherein R A is R or preferably H) is reacted with a reactive derivative of an acid of the formula L 4 .(CH 2 ) n .CH 2 .C0 2 H, or such an acid with a substituent R 1 and/or R 21 on the 2-carbon atom, wherein L 4 is a reactive group such as a chlorine or bromine atom.
• the reactive derivative is preferably the acid chloride, but may be the bromide or anhydride.
• the reaction is effected under Friedel- Crafts conditions with a catalyst and inert organic solvent; the catalyst is for example anhydrous aluminum chloride or boron trifluoride, and the solvent is preferably nitrobenzene.
• the reaction is typically started at low temperature, e.g., at 0-20°C, and continued at moderately elevated temperature, e.g., 30-100°C.
• a group R 21 (where R 2 is other than hydrogen) may be introduced in Step (b) as described under Scheme A above.
• the group R A is hydrogen
• the group R may be introduced in Step (c) by reaction of the starting material with a compound of the formula RL 4 , wherein L 4 is a leaving group, e.g., a sulfonate ester group but preferably a halogen, especially Cl or Br.
• the reaction is preferably carried out in an organic solvent in the presence of a strong inorganic base, e.g., sodium or potassium hydride or hydroxide, and an inert organic solvent, e.g. anhydrous DMSO, DMF, or a polar ether such as dimethoxyethane.
• Steps (d) and (e) may then be carried out as described under Scheme A above for Steps (b), (c) and (d) therein.
• Scheme C :
• Step (a) the group R is introduced by reaction of the starting material with a compound of the formula RL 4 , wherein L 4 is a leaving group, as described under Step (c) of Scheme B above.
• the remaining steps (b) through (g) can then be effected according to the processes described above for steps (b) through (g) respectively of Scheme A.
• Step (a) (reductive amination) can be carried out according to the alternative condensation/reduction process of Scheme A (described above as an alternative method for preparing compounds of the formulae A5 and A7).
• the group L 5 is preferably a chlorine atom or especially a bromine or iodine atom.
• the product of the formula D2 can then be reacted with an alkyl-lithium reagent, e.g., n-BuLi or t-BuLi, in an inert anhydrous organic solvent, to replace the group L 5 with Li, and the resulting organometallic compound can be reacted with the aldehyde RCHO to yield the compound of the formula D3.
• an alkyl-lithium reagent e.g., n-BuLi or t-BuLi
• the benzylic hydroxy group in D3 can then be reduced, for example with a trialkylsilane, preferably Et 3 SiH, and a strong acid, preferably trifluoroacetic acid.
• a trialkylsilane preferably Et 3 SiH
• a strong acid preferably trifluoroacetic acid.
• the product of the formula D4 is to contain a group R 1 or R 21 , this group may be introduced into the compound of the formula D1.
• the group R 2 in this process is preferably a nitrogen-protecting group, e.g., a benzyloxycarbonyl (CBZ) or especially a t-butyloxycarbonyl (BOC) group.
• Such a protecting group can be replaced with a group R 2 defined above under formula I.
• a protecting group such as an amidating group can be removed by hydrolysis; e.g., a protecting BOC group can be removed with trifluoroacetic acid or with HCI in EtOAc.
• the desired group R 2 can then be introduced (in one or more steps); for example, a 1 -piperidinyl group or N-Ry-1-piperidinyl group can be introduced by reductive condensation with a compound of the formula
• any further substituent Ry (wherein RY is as defined above) can then be introduced on to the newly liberated nitrogen atom.
• an amide can be formed by condensation with the acid chloride (Ry.CI, when Ry is an acyl group), if necessary in the presence of a base, or by condensation with the acid itself (Ry.OH, when Ry is an acyl group) in the presence of 1-hydroxy- benzotriazole, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, and N-methyl- morphoiine.
• a resulting compound of the formula I wherein Q represents S can be oxidized to a compound wherein Q represents SO or S0 2 ;
• the oxidizing agent is preferably a peracid such as peracetic acid, 3-chloroperbenzoic acid, or perboric acid, in the presence of a strong acid used in excess, e.g., methanesulfonic acid.
• oxidizing agent if the compound wherein Q is S is being oxidized to the sulfoxide (or the sulfoxide to the sulfone), then about one equivalent of oxidizing agent should be used; if the compound wherein Q is S is being oxidized to the sulfone, then about two equivalents (preferably at least two equivalents) of oxidizing agent should be used.
• the compounds of formula I exhibit selective m2 and/or m4 muscarinic antagonizing activity, which has been correlated with phannaceutical activity for treating cognitive disorders such as Alzheimer's disease and senile dementia.
• the compounds of formula I display pharmacological activity in test procedures designed to indicate ml , m2 and m4 muscarinic antagonist activity.
• the compounds are non-toxic at pharmaceutically therapeutic doses. Following are descriptions of the test procedures.
• the compound of interest is tested for its ability to inhibit binding to the cloned human ml , m2, and m4 muscarinic receptor subtypes.
• the sources of receptors in these studies were membranes from stably transfected CHO cell lines which were expressing each of the receptor subtypes. Following growth, the cells were pelleted and subsequently homogenized using a Polytron in 50 volumes cold 10 mM Na/K phosphate buffer, pH 7.4 (Buffer B). The homogenates were centrifuged at 40,000 x g for 20 minutes at 4°C. The resulting supernatants were discarded and the pellets were resuspended in Buffer B at a final concentration of 20 mg wet tissue/ml. These membranes were stored at -80°C until utilized in the binding assays described below.
• Binding to the cloned human muscarinic receptors was performed using 3 H-quinuclidinyl benzilate (QNB) (Watson et al., 1986). Briefly, membranes (approximately 8, 20, and 14 ⁇ g of protein assay for the ml , m2, and m4-containing membranes, respectively) were incubated with 3 H-QNB (final concentration of 100-200 pM) and increasing concentrations of unlabeled drug in a final volume of 2 ml at 25°C for 90 minutes. Non-specific binding was assayed in the presence of 1 ⁇ M atropine.
• QNB 3 H-quinuclidinyl benzilate
• the Kj value for ml receptors was divided by the Kj value for m2 receptors. A higher ratio indicates a greater selectivity for binding the m2 muscarinic receptor.
• Microdialysis All of the equipment and instrumentation used to conduct in vivo microdialysis was obtained from Bioanalytical Systems, Inc. (BAS). The microdialysis procedure required the insertion through the guide cannula of a thin, needle-like perfusable probe (CMA/12.3 mm x 0.5 mm) to a depth of 3 mm in striatum beyond the end of the guide. The probe was connected beforehand with tubing to a microinjection pump (CMA-/100). Rats were collared and tethered, and, following probe insertion, were placed in a large clear plexiglass bowl with litter material and access to food and water.
• BAS Bioanalytical Systems, Inc.
• the probe was perfused at 2 ⁇ l/min with Ringer's buffer (NaC1 147 mM; KCI 3.0 mM; CaCI 2 1.2 mM; MgCI 2 1.0 mM) containing 5.5 mM glucose, 0.2 mM L-ascorbate, and 1 ⁇ M neostigmine bromide at pH 7.4.
• Ringer's buffer NaC1 147 mM; KCI 3.0 mM; CaCI 2 1.2 mM; MgCI 2 1.0 mM
• Acetylcholine (ACh) analysis The concentration of ACh in collected samples of microdialysate was determined using HPLC/electrochemical detection. Samples were auto-injected (Waters 712 Refrigerated Sample Processor) onto a polymeric analytical HPLC column (BAS, MF-6150) and eluted with 50 mM Na 2 HP ⁇ 4, pH 8.5. To prevent bacterial growth, Kathon CG reagent (0.005%) (BAS) was included in the mobile phase. Eluate from the analytical column, containing separated ACh and choline, was then immediately passed through an immobilized enzyme reactor cartridge (BAS, MF-6151) coupled to the column outlet.
• ACh Acetylcholine
• the reactor contained both acetylcholinesterase and choline oxidase covalently bound to a polymeric backbone.
• the action of these enzymes on ACh and choline resulted in stoichiometric yields of hydrogen peroxide, which was electrochemically detected using a Waters 460 detector equipped with a platinum electrode at a working potential of 500 mvolts.
• Data acquisition was carried out using an IBM Model 70 computer equipped with a microchannel IEEE board. Integration and quantification of peaks were accomplished using "Maxima" chromatography software (Waters Corporation). Total run time per sample was 11 minutes at a flow rate of 1 ml/min. Retention times for acetylcholine and choline were 6.5 and 7.8 minutes respectively.
• ACh standards were included at the beginning, middle and end of each sample queue.
• the present invention also relates to achieving similar synergistic results by administering any compound capable of enhancing ACh release, such as a muscarinic antagonist, e.g., scopolamine or QNB, in combination with an acetylcholinesterase inhibitor.
• a muscarinic antagonist e.g., scopolamine or QNB
• the ACh release-enhancing compound is either an m2 selective muscarinic antagonist, i.e. one having a ratio of (Kj for m1)/(Kj for m2) greater than 1
• an m4 selective muscarinic antagonist i.e. one having a ratio of (Kj for m1)/(Kj for rr»4) greater than 1.
• m2 or m4 selective muscarinic antagonists for practicing this aspect of the invention include without limitation 3- ⁇ -chloroimperialine, AF-DX 116, AF-DX 384, BIBN 99 (these last three compounds being available from Boehringer- Ingleheim), tripitramine, and himbacine.
• compositions can be prepared from the compounds of formula I, which are capable of enhancing ACh release, by admixing them with pharmaceutically acceptable, inert carriers.
• Acetylcholinesterase inhibitors can be used as optional constituents of such phannaceutical compositions to provide a better, frequently even synergistic, effect.
• the pharmaceutically acceptable carriers may be either solid or liquid.
• Preparations in solid form include powders, tablets, dispersible granules, capsules, cachets and suppositories.
• a solid carrier can be one or more substances which may also act as diluents, flavoring agents, solubilizers, lubricants, suspending agents, binders or tablet-disintegrating agents; it may also be an encapsulating material.
• Preparations in liquid form include solutions, suspensions and emulsions.
• solutions in water or in water-propylene glycol for parenteral injection may be mentioned solutions in water or in water-propylene glycol for parenteral injection.
• preparations in solid form which are intended for conversion, shortly before use, to liquid form preparations for either oral or parenteral administration.
• liquid forms include solutions, suspensions and emulsions.
• the solid forms are most conveniently provided in unit dose form for this purpose and are used to provide a single liquid dosage unit.
• transdermal compositions can take the form of creams, lotions and/or emulsions and can be included in transdermal patches of the matrix or reservoir type as are conventional in the art for this purpose.
• the pharmaceutical preparation is in unit dosage form.
• the preparation is subdivided into unit doses containing appropriate quantities of the active components.
• the unit dosage form can be a packaged preparation, the package containing discrete quantities of preparation such as packeted tablets, capsules and powders in vials or ampoules.
• the unit dosage form can also be a capsule, cachet or tablet itself, or it may be the appropriate number of any of these in a packaged form.
• the quantity of active compound in a unit dose preparation may be varied or adjusted from 1 mg to 100 mg according to the particular application and the potency of the active ingredient and the intended treatment. This would correspond to a dose of about 0.001 to about 20 mg/kg, which may be divided over 1 to 3 administrations per day.
• the composition may, if desired, also contain other therapeutic agents.
• the dosages may be varied, depending on the requirement of the patient, the severity of the treated condition, and the particular compound administered. Determination of the proper dosage for a particular situation is within the skill of those in the medical art. For convenience, the total daily dosage may be divided and administered in portions throughout the day or by means providing continuous delivery. When a compound of formula I or a compound capable of enhancing ACh release is used in combination with an acetylcholinesterase inhibitor to treat cognitive disorders, these two active components may be co-administered simultaneously or sequentially. Alternatively, a single pharmaceutical composition comprising a compound of formula I or a compound capable of enhancing ACh release and an acetylcholinesterase inhibitor in a pharmaceutically acceptable carrier can be administered.
• the components of the combination can be administered individually or together in any conventional oral or parenteral dosage form, such as capsule, tablet, powder, cachet, suspension, solution, suppository, nasal spray, etc.
• the dosage of the acetylcholinesterase inhibitor may range from 0.001 to 100 mg/kg body weight.
• the invention disclosed herein is exemplified by the following Examples, which should not be construed to limit the scope of the disclosure. Alternative mechanistic pathways and analogous structures may be apparent to those skilled in the art.
• 6-Hydroxytetralone (31 mmol) was dissolved in dry DMF (50 mL), chilled in an ice/water bath and blanketed with a stream of nitrogen. NaH (60% in mineral oil, 31 mmol) was added slowly and in portions. Once gas evolution ceased, 2-chloropyrimidine (31 mmol) was added, the ice bath was removed and the solution heated at 100°C for 1.5 hours. It was then cooled to room temperature and the solvent was removed in vacuo. The residue was treated with water and CH 2 CI 2 (200 mL each).
• 5-Hydroxyindanone (3.2 g, 21.6 mmol) was dissolved in dry DMF (20 mL) in a 3-neck flask fitted with an N 2 inlet and reflux condenser. The system was blanketed with N 2 , and 60% NaH in mineral oil (860 mg) was added slowly and in portions at 0°C. Then 2-chloropyrimidine (2.5 g) was added, the ice bath was replaced with an oil bath, and the solution was heated at 100°C for 3 hours. This was then cooled to room temperature before removal of DMF in vacuo.

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• 1997
  • 1997-06-26 AT AT97931281T patent/ATE224884T1/de not_active IP Right Cessation
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  • 1997-06-26 DE DE69715865T patent/DE69715865T2/de not_active Expired - Fee Related
  • 1997-06-26 KR KR1019980710811A patent/KR20000022380A/ko not_active Withdrawn
  • 1997-06-26 JP JP10504196A patent/JP2000514060A/ja not_active Ceased
  • 1997-06-26 EP EP97931281A patent/EP0912534B1/en not_active Expired - Lifetime
  • 1997-06-26 AU AU34953/97A patent/AU717431B2/en not_active Ceased
  • 1997-06-26 WO PCT/US1997/010696 patent/WO1998000412A1/en not_active Ceased
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