反应详情

To a solution of 2.5 g of 4-(3',5'-dichlorophenyl) urazole and 1 g of triethylamine in 10 ml of N,N-dimethylformamide was added dropwise 1.1 g of ethylchloroformate with agitation. The reaction and agitation were continued at room temperature for one hour. The reaction mass was mixed with water to precipitate crystals which were filtered and recrystallized from acetone-ethanol to obtain 2.3 g of 1-ethoxycarbonyl-4-(3',5'-dichlorophenyl) urazole, which constituted a yield of 72%.

1. customThe reaction and agitation
2. customto precipitate crystals which
3. filtrationwere filtered
4. customrecrystallized from acetone-ethanol