反应详情

2-(Methylthio)benzoxazole (5.8 g, see (a) above) was dissolved in chloroform (75 ml) and a solution of bromine (6.0 g) in chloroform (30 ml) was added dropwise, with stirring, over a period of 45 minutes. The mixture was allowed to stand overnight at room temperature and the solvent removed by distillation under reduced pressure to give a brown oil. The oil was washed with aqueous sodium metabisulfite and crystallised from ethanol/water to give the title compound as pink platelets (2.0 g), mp 95°-96° C.

1. waitto stand overnight at room temperature
2. customthe solvent removed by distillation under reduced pressure
3. customto give a brown oil
4. washThe oil was washed with aqueous sodium metabisulfite
5. customcrystallised from ethanol/water