反应详情

To a solution of N-(cyclopropyl)glycine t-butyl ester (12 g, 0.0702 mol) and 3-acetylthio-2-methylpropionic acid (8.1 g, 0.050 mol) in methylene chloride (200 ml) chilled in an ice bath was added dicyclohexylcarbodiimide (14.4 g, 0.070 mol). The resulting mixture was stirred for sixteen hours at room temperature. The dicyclohexylurea was removed by filtration and washed with diethyl ether. Evaporation of the filtrate yielded the crude product as a pale yellow oil which was used without further purification.

1. customThe dicyclohexylurea was removed by filtration
2. washwashed with diethyl ether
3. customEvaporation of the filtrate