An unprecedented stereoselective base-induced trimerization of an α-bromovinylsulfone
作者:Brendan Fisher、Romain J. Lepage、Jonathan M. White、Young Ye、Elizabeth H. Krenske、Mark A. Rizzacasa
DOI:10.1039/c7ob01121k
日期:——
A unprecedented base-induced trimerization of bromovinylsulfone 1 afforded the cyclohexene 6 as a single diastereoisomer. Optimization of this reaction gave the adduct 6 in 49% yield. A mechanistic rationale for the trimerization involving consecutive SN2' additions and [3,3]-rearrangements and a final stereoselective intramolecular conjugate addition is proposed and supported by M06-2X density functional
前所未有的碱诱导的溴乙烯砜1的三聚反应提供了环己烯6,为单一的非对映异构体。该反应的最优化得到加合物6,产率为49%。M06-2X密度泛函理论计算提出并支持了涉及连续SN2'加成和[3,3]-重排以及最终的立体选择性分子内共轭加成的三聚机理。