反应详情

A solution of 12.3 g of 5,6-dichloro-1-indanone, 12.6 ml of 3-buten-2-ol and 125 mg of p-toluenesulfonic acid in 125 ml of 2,2-dimethoxy-propane was boiled under reflux for 68 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). In addition to 4.3 g of educt, there were obtained 10.8 g (69%) of (RS)-2-(2-buten-1-yl)-5,6-dichloro-1-indanone 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)
4. additionIn addition to 4.3 g of educt