Enantiospecific, Regioselective Cross-Coupling Reactions of Secondary Allylic Boronic Esters
作者:Laetitia Chausset-Boissarie、Kazem Ghozati、Emily LaBine、Jack L.-Y. Chen、Varinder K. Aggarwal、Cathleen M. Crudden
DOI:10.1002/chem.201303683
日期:2013.12.23
enantioselective Suzuki–Miyaura cross‐coupling of chiral, enantioenriched secondary allylic boronic esters is described (see scheme; DME=dimethoxyethane, Bpin = pinacolboryl, dba = dibenzylideneacetone). Mechanistic studies show that the reactions proceed via γ‐selective transmetalation followed by reductive elimination. The reaction provides the first independent confirmation that the transmetalation of
原件 syn:描述了手性,对映体富集的仲烯丙基硼酸酯的第一次对映选择性Suzuki-Miyaura交叉偶联(参见方案; DME =二甲氧基乙烷,Bpin =频哪醇硼酸酯,dba =二苄叉基丙酮)。机理研究表明,反应是通过γ-选择性重金属化然后还原消除进行的。该反应提供了第一个独立的确认,即硼酸酯的过渡金属化是通过syn途径进行的。