Stereoselective synthesis of 3-hydroxy-2-sulfonyltetrahydrofurans from β-(triethylsilyloxy)aldehydes and p -tolylsulfonyldiazomethane
作者:Steven R Angle、Stephanie Z Shaw
DOI:10.1016/s0040-4020(01)00365-9
日期:2001.6
A new method for the stereoselective syntheses of 2-sulfonyltetrahydrofurans from β-(triethylsilyloxy)aldehydes and p-tolylsulfonyldiazomethane in the presence of BF3·OEt2 as Lewis acid is reported. The versatility of the sulfonyl functional group allows further functionalization alpha to the sulfonyl group. For example, treatment of 2-sulfonlytetrahydrofuran 2b with BF3·OEt2 and allyl silane afforded
报道了在BF 3 ·OEt 2作为路易斯酸存在下,由β-(三乙基甲硅烷氧基)醛和对甲苯磺酰基重氮甲烷立体选择性合成2-磺酰基四氢呋喃的新方法。磺酰基官能团的多功能性使得对磺酰基的α进一步官能化。例如,用BF 3 ·OEt 2和烯丙基硅烷处理2-磺基四氢呋喃2b以85%的收率得到烷基化脱磺酰基化产物。