反应详情

A solution of 19.7 g of 6-fluoro-1-indanone, 27.0 ml of 3-buten-2-ol and 200 mg of p-toluenesulfonic acid in 200 ml of 2,2-dimethoxypropane was boiled under reflux for 67 hours on a water separator filled with molecular sieve (0.4 nm, 2 mm pearl shaped). The reaction mixture was subsequently concentrated in a vacuum and purified by column chromatography on silica gel (hexane/diethyl ether 4:1). 18.9 g (71%) of (RS)-2-(2-buten-1-yl)-6-fluoro-1-indanone were obtained as a yellow oil.

1. additionseparator filled with molecular sieve (0.4 nm, 2 mm pearl shaped)
2. concentrationThe reaction mixture was subsequently concentrated in a vacuum
3. custompurified by column chromatography on silica gel (hexane/diethyl ether 4:1)