Hydrazine hydrate (1:1) → HCID 18439653, compound

Participants

Reaction Steps

4.66 g (10 mmoles) of (±)-3-acetyl-7-bromo-4,5-dihydro-1-(3-chloro-4-nitrophenyl)-4-methyl-8-methoxy-3H-2,3-benzodiazepine are dissolved in a mixture of 45 cm3 of methanol and 45 cm3 of dichloromethane, then 3.0 g of wet Raney nickel catalyst and, under vigorous stirring, 1.7 cm3 (35 mmoles) of 98% hydrazine hydrate are added. The reaction mixture is stirred for further 45 minutes, the catalyst is filtered, washed with dichloromethane, the filtrate is evaporated, and the residue is rubbed with 50 cm3 of water to obtain solid matter. The crude product is purified by boiling in 50 ml of acetonitrile. Thus, 3.52 g (81%) of the title compound are obtained in the form of white solids melting at 235–237° C.

Provenance & Evidence