Halogenation reaction of 2-methyl, 2, 4- diphenyl-1H-1, 5-benzodiazepine (1) with thionyl chloride gave the N-chloro derivative(2) which on condensation with 4- substituted piperazines afforded the title compounds (3) which were characterized by analytical and spectral data. All these compounds (3a-c) showed significant anti-anxiety activity against diazepam as a standard by elevated plus maze method.
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