| abstract |
The invention relates to novel 3,4-dihydro-5H-2,3-benzodiazepine derivatives of general formula I and pharmaceutically acceptable acid addition salts thereof (wherein R is an unsubstituted or substituted by one or two halogen, hydroxy, C 1-4 alkoxy) and / or benzyloxy substituent substituted phenyl group or a furyl or thienyl group; R 1 represents a hydrogen atom or a C 1 to C 1 1-4 alkyl group; R 2 and R 3 independently of one another represent hydrogen, C 1 to 4 alkoxy, C deep 4-7 cycloalkoxy or benzyloxy). The novel compounds of the general formula I can be prepared from the compounds of the general formula II (in which R, R 1, R 2 and R 3 have the above meaning) by reduction with a hydride or complex metal hydride. The novel compounds of the general formula I have many and significant effects on the central nervous system and can be used in therapy. |