反应详情

温度

20 °C

To a solution of compound 6-benzyl-7-hydroxy-3-phenyl-(3S, 7aR)-perhydroimidazo[1,5-C][1,3]thiazol-5-one of formula (6) (0.326 parts, 1 mmol) in dichloromethane (10 parts) was added 1-trimethylsilyloxy-1-cyclohexene (0.340 parts. 2 mmol). Then the solution was cooled to 20° C., and Lewis acid for example BF3.Et2O (0.142 parts, 1 mmol) was added drop wise. The reaction mixture was stirred at 20° C. for 10 mints. and the reaction mixture was quenched with saturated ammonium chloride (10 parts). Then the organic layer was separated, concentrated and column purification with ethylacetate:pet.ether (15:85) as eluent provided compound 6-benzyl-7-(2-oxocyclohexyl)-3-phenyl-(3S, 7S, 7aR)-perhydroimidazo[1,5-C][1,3]-thiazol-5-one of formula (7d) (viscous liquid, 0.398 parts, 0.98 mmol) in98% yield.

1. customand the reaction mixture was quenched with saturated ammonium chloride (10 parts)
2. customThen the organic layer was separated
3. concentrationconcentrated
4. customcolumn purification with ethylacetate