Hydrazine hydrate (1:1) → HCID 10271673, compound

Participants

Reaction Steps

4.2 g (10 mmoles) of (±)-4,5-dihydro-7,8-dichloro-4-methyl-1-(3-methyl-4-nitrophenyl)-3-propionyl-3H-2,3-benzodiazepine are dissolved in a mixture of 40 cm3 of methanol and 40 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 chromatography over a column containing silica gel and using a mixture of ethyl acetate and hexane, then the product is recrystallized from acetonitrile. Thus, 1.99 g (56%) of the title compound are obtained in the form of pale yellow solids melting at 106–108° C.

Provenance & Evidence