Abstract:
PROBLEM TO BE SOLVED: To provide an efletirizine which is a pharmaceutical having excellent antihistaminic properties, namely, a new crystal form of a 2-[2-[4-[bis (4-fluorophenyl) methyl]-1-piperazinyl]ethoxy]acetic acid dihydrochloride, and to provide a method for preparation of the crystal and to a pharmaceutical composition comprising the same. SOLUTION: The invention relates to the new pseudopolymorphic forms of 2-[2-[4-[bis(4- fluorophenyl)methyl]-1-piperazinyl]ethoxy]acetic acid dihydrochloride, defined by the X-ray diffraction pattern, namely, anhydrous 2-[2-[4-[bis(4-fluorophenyl)methyl]-l-piperazinyl]ethoxy]acetic acid dihydrochloride and a monohydrate of the crystal, and relates to the method for preparation of the pseudopolymorphic crystal. The invention also relates to the pharmaceutical composition comprising the pseudopolymorphic crystal, slow release excipient and a cyclodextrine. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a 1,4-disubstituted piperazine derivative of high optical purity having valuable pharmacological activity and especially antihistamine activity and to provide its production intermediate. SOLUTION: There is provided compounds with the optical purity of higher than 98% selected from the group consisting of a levorotatory dihydrochloride of 1-[(4-chlorophenyl)phenylmethyl]-4-[(3-methylphenyl)methyl]piperazine, a dextrorotatory dihydrochloride of 1-[(4-chlorophenyl)phenylmethyl]-4-[(3-methylphenyl)methyl]piperazine or the like. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a pharmaceutical composition especially suitable for the treatment of neurologic damage such as epilepsy, seizure disorder, manic psychosis, depression, Parkinson's disease and bronchial asthma. SOLUTION: The pharmaceutical composition contains (4R) and/or (4S) diastereomer of a (2S)-2-[2-oxo-4-propylpyrrolidinyl]butanamide derivative or its pharmaceutically permissible salt. COPYRIGHT: (C)2006,JPO&NCIPI