Diisopropylethylamine → N-[4-(4H-Pyrazolo[5,1-c][1,4]benzodiazepin-5(10H)-ylcarbonyl)-3-chlorophenyl]-5-fluoro-2-methylbenzamide

Participants

Reaction Steps

A mixture of 0.185 g of 5,10-dihydro-4H-pyrazolo[5,1-c][1,4]benzodiazepine, 0.391 g of 4-[(5-fluoro-2-methylbenzoyl)amino]-2-chlorobenzoyl chloride and 0.158 g of diisopropylethylamine in 10 ml of dichloromethane is stirred at room temperature overnight. The mixture is washed with H2O, 1N HCl, H2O, 1M NaHCO3, brine and dried Na2SO4). The solution is passed through a thin pad of hydrous magnesium silicate and the filter cake washed with dichloromethane. The filtrate is again passed through a thin pad of hydrous magnesium silicate. The filtrate is concentrated and the solid crystallized from ethyl acetate to give crystals, m.p. 137°-140° C.

Provenance & Evidence