acid-catalyzed intramolecular reactions of oxocarbenium ions with propargylsilanes are described. The results obtained indicate that trimethylsilyl trifluoromethanesulfonate (TMSOTf) efficiently catalyses cyclization leading to the corresponding 3-vinylidene tetrahydropyrans in high yield as single isomers.
描述了
路易斯酸催化氧碳鎓离子与炔丙基
硅烷的分子内反应。所得结果表明,三甲基甲
硅烷基
三氟甲磺酸盐(TMSOTf)有效催化环化反应,从而以单一收率高产率地产生相应的3-亚
乙烯基四氢吡喃。