The ene-reaction between a variety of aldehydes and allylsilane 22 generates highly functionalised homoallylic alcohols 23. These adducts undergo a subsequent Intramolecular Sakurai Cyclisation (IMSC), affording in good yields polysubstituted tetrahydropyran derivatives. Furthermore, oxidative desilylation of 23 provides an efficient, connective access to a range of γ-butyrolactones and α-methylene-γ-butyrolactones.
各种醛和
烯丙基
硅烷 22 之间的
烯反应生成高度官能化的均
烯丙基醇 23。这些加合物在随后的分子内樱井环化(IMSC)反应中,可以得到收率很高的多取代
四氢吡喃衍
生物。此外,对 23 进行
氧化
脱硅处理,可以高效地连接到一系列 δ³ 丁内
酯和 δ±-亚
甲基-δ³
-丁内酯。