反应详情

A solution of crude (RS)-2-amino-2-(3-bromo-phenyl)-propan-1-ol (8.38 g, 36 mmol) and triethylamine (6.08 ml, 44 mmol) in acetonitrile (140 ml) was treated dropwise at −2° C. with chloroacetylchloride (3.25 ml, 40 mmol). After complete addition, the orange colored solution was left to warm to room temperature and stirring was continued for 2 h. For the workup, to the reaction was added silica gel (10 g) and it was evaporated at reduced pressure, thereafter, it was purified by chromatography on silica gel using a gradient of dichloromethane/methanol=100/0 to 90/10 as the eluent. 9.62 g (86%) of (RS)-N-[1-(3-bromo-phenyl)-2-hydroxy-1-methyl-ethyl]-2-chloro-acetamide were obtained as a light brown oil. Mass (calculated) C11H13BrClNO2 [306.589]; (found) [M+H]+=306, 308.

1. additionAfter complete addition
2. waitthe orange colored solution was left
3. additionFor the workup, to the reaction was added silica gel (10 g) and it
4. customwas evaporated at reduced pressure
5. customit was purified by chromatography on silica gel using a gradient of dichloromethane/methanol=100/0 to 90/10 as the eluent