3,4-dihydro-5h-2,3-benzodiazepine derivatives and a process...

C - Chemistry – Metallurgy – 07 – D

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260/239.7

C07D 243/02 (2006.01) C07D 405/04 (2006.01) C07D 409/04 (2006.01)

Patent

CA 1178584

ABSTRACT The invention relates to new 3,4-dihydro- -5H-2,3-benzodiazepine derivatives of the general formula (I) and pharmaceutically acceptable acid addition salts thereof. Image wherein R represents a phenyl group optionally carrying one or two substituents selected from the group consisting of halogen, hydroxy, C1-4 alkoxy and benzyloxy; a furyl or a thienyl group, R1 stands for a hydrogen atom or a C1-4 alkyl group, R2 and R3 each represent hydrogen atom, C1-4 alkoxy, C4-7 cycloalkoxy or benzyloxy group. The new compounds of the general formula (I) can be prepared by reducing a 5H-2,3-benodiazepine derivative of the general formula (II) Image (II) wherein R, R1, R2 and R3 have the above-defined meanings, with an inorganic or organic hydride and and complex metal hydride. The new compounds of the general formula (I) possess significant cent- ral nervous effects and can advantageously be used in the therapy.

398115

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