Methanol → 5-(3-Bromophenyl)-5-methylmorpholin-3-one

Participants

Reaction Steps

A solution of (RS)-N-[1-(3-bromo-phenyl)-2-hydroxy-1-methyl-ethyl]-2-chloro-acetamide (5.36 g, 17 mmol) in 2-methyl-2-butanol (100 ml) was treated in one portion with potassium tert-butylate (6.66 g, 58 mmol). Initially, the temperature rose to 30° C.; the reaction mixture was left to cool to room temperature and stirring was continued for one hour. For the workup, the reaction mixture was treated with methanol (50 ml), then evaporated at reduced pressure. The residue was purified by chromatography on silica gel using a gradient of dichloromethane/methanol=100/0 to 75/25 as the eluent. 4.18 g (88%) of (RS)-5-(3-bromo-phenyl)-5-methyl-morpholin-3-one were obtained as a white solid. Mass (calculated) C11H12BrNO2 [270.128]; (found) [M+H]+=270 and [M+2+H]+=272.

Provenance & Evidence