反应详情

10 ml of a 20% solution of dimethylamine in dioxane is added at 25° to a solution of 0.705 g (0.002 mole) of 6-phenyl-8-chloro-4H-s-triazolo[4,3-a][1,4]benzodiazepine-1-carboxylic acid methyl ester in 10 ml of methanol. After 24 hours, the reaction mixture is concentrated by evaporation, and the residue crystallised from ethyl acetate/petroleum ether to obtain N,N-dimethyl-6-phenyl-8-chloro-4H-s-triazolo[4,3-a][1,4]benzodiazepine-1-carboxamide, M.P. 180°-181°.

1. concentrationthe reaction mixture is concentrated by evaporation
2. customthe residue crystallised from ethyl acetate/petroleum ether