反应详情

A solution of 15.8 g (0.05 mol) of 7-bromo-1,3-dihydro-5-(2-pyridyl)-2H-1,4-benzodiazepin-2-one in 300 ml of dry tetrahydrofuran was cooled to 10° with stirring under argon. Potassium tert. butoxide 6.3 g (0.056 mol) was added and stirring was continued for 10 min. Following the addition of 14 ml of diethyl chlorophosphate the mixture was stirred for additional 20 min. A previously prepared mixture of 11.3 g ethyl isocyanoacetate, 11.3 g of potassium tert. butoxide and 300 ml of tetrahydrofuran was then poured into the reaction mixture.

1. stirringstirring
2. stirringwas stirred for additional 20 min
3. additionwas then poured into the reaction mixture