Cinchonidine salt of (4S,5S)-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid, useful as intermediate in the preparation of cannabinoid CB1 neutral antagonists

Cinchonidine salt of (4S,5S)-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid, useful as intermediate in the preparation of cannabinoid CB1 neutral antagonists

The present invention relates to a cinchonidine salt of (4S,5S)-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid. This cinchonidine salt is prepared by enantiomeric resolution of a compound of formula (I) comprising: the reaction of compound of formula (I)...

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Bibliographische Detailangaben
Hauptverfasser: BERENGUER MAIMO, RAMON, LLUIS TOUS, JORDI, BARTRA SANMARTI, MARTI
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC CHEMISTRY
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
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Zusammenfassung:The present invention relates to a cinchonidine salt of (4S,5S)-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid. This cinchonidine salt is prepared by enantiomeric resolution of a compound of formula (I) comprising: the reaction of compound of formula (I) with cinchonidine in a suitable solvent, thereby resulting in the cinchonidine salt of the enantiomer (4S,5S) of formula (II); and optionally isolating said salt. The cinchonidine salt according to formula (II) is a useful intermediate in the preparation of a cannabinoid CB 1 neutral antagonist.