Treatment of β-vinyl-β-hydroxy-N-acyloxazolidin-2-ones with VO(acac)2 and tert-butyl hydroperoxide results in formation of unstable epoxides that are ring-opened by intramolecular nucleophilic attack of their exocyclic carbonyl fragments to afford highly functionalized trisubstituted hydroxy-γ-butyrolactones in >95% de, with a polymer-supported oxazolidin-2-one having been used to transfer this methodology
用VO(acac)2和叔
丁基氢过氧化物处理β-
乙烯基-β-羟基-N-酰基
恶唑烷二-2-酮会导致形成不稳定的
环氧化物,这些
环氧化物会通过分子内亲核攻击其环外羰基片段而开环高度> 95%de的高度官能化的三取代羟基-
γ-丁内酯,以及聚合物负载的
恶唑烷丁-2-酮已被用于将该方法转移至固相。