反应详情

Butyl lithium (2.5 M, 12.5 ml) in hexane was added to a solution of 2-chlorothiazole (3.6 g, 30 mmol) in tetrahydrofuran (100 ml) at -78° C. under an atmosphere of nitrogen. After 10 minutes, a solution of 2-(2,4-dichlorophenyl)-2-methyloxirane (5.4 g, 26 mmol) in tetrahydrofuran (40 ml) was added and the mixture was slowly allowed to warm to room temperature and then stirred for a further 3 hours. Water was added and the tetrahydrofuran was then evaporated under reduced pressure. The residue was extracted with ethyl acetate (2×300 ml) and the combined organic extract was washed with saturated sodium chloride solution and then dried. Flash chromatography of the residue on a silica gel column using ethyl acetate-petroleum ether as eluant gave 2-(2,4-dichlorophenyl)-1-(2-chlorothiazol-5-yl)-propan-2-ol (6.4 g) as a white solid, m.pt. 164° C.

1. customthe tetrahydrofuran was then evaporated under reduced pressure
2. extractionThe residue was extracted with ethyl acetate (2×300 ml)
3. extractionthe combined organic extract
4. washwas washed with saturated sodium chloride solution
5. customdried