β-Silyl-γ-ethylidene-γ-butyrolactone upon one-pot treatment with aldehydes and ketones in the presence of Lewis acids underwent a tandem Hosomi–Sakurai/Prins cyclization to give polysubstituted tetrahydropyranones stereoselectively. Various aldehydes and ketones can be used in this reaction to produce the corresponding tetrahydropyranones. The optical purity of the starting γ-butyrolactone was substantially
β-甲
硅烷基-γ-亚乙基-
γ-丁内酯在
路易斯酸存在下用醛和酮进行一锅处理后,经过串联的Hosomi-Sakurai/Prins环化反应,立体选择性地得到多取代的
四氢吡喃酮。在该反应中可以使用各种醛和酮来生产相应的
四氢吡喃酮。起始
γ-丁内酯的光学纯度基本上保留在所得
四氢吡喃酮中。