反应详情

1.0 g (6.85 mmol) of glucal is taken up in 1.5-2.0 ml of tetrahydrofuran and 3-5 ml of vinyl benzoate and stirred with 1 g of lipase from Candida cylindracea (Amano AY-20) at room temperature for 6 h. Filtering off the enzyme, concentration of the solution in vacuo, taking up the residue in ethyl acetate and extracting it with aqueous NaHCO3 solution, and subsequent chromatography on silica gel (ethyl acetate/hexane 1:1) result in 1.20 g (70%) of the desired 6-O-benzoylglucal.

1. filtrationFiltering off the enzyme, concentration of the solution in vacuo
2. extractionextracting it with aqueous NaHCO3 solution, and subsequent chromatography on silica gel (ethyl acetate/hexane 1:1)
3. customresult in 1.20 g (70%) of the desired 6-O-benzoylglucal