反应详情

50% Sodium hydroxide aqueous solution (1 ml) was added to a methanol (20 ml) solution of 3-(1-ethyl 3,3,5-trimethyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-7-yl) propionic acid ethyl ester (1.1 g). The mixture was stirred at room temperature overnight. Water was added to the reaction liquid, followed by washing with ether. A hydrochloric acid was added to the aqueous layer, followed by extraction using ethyl acetate and drying using magnesium sulfate. The dried product was condensed under reduced pressure to give the title compound (0.97 g) as a colorless oily matter.

1. washby washing with ether
2. additionA hydrochloric acid was added to the aqueous layer
3. extractionfollowed by extraction
4. customdrying
5. customcondensed under reduced pressure