In the presence of hypervalent iodine reagents, silyl-substituted δ,ε-unsaturated alcohols (4a–f) underwent ring-closure to give the pyran-3-ones (5) as well as tosyloxy substituted tetrahydropyrans (6) and (7).
在存在高价
碘试剂的情况下,对甲
硅烷基取代的δ,μ-不饱和醇(4a – f)进行闭环反应,得到
吡喃-3-酮(5)以及对
甲苯氧基取代的
四氢吡喃(6)和(7) 。