Stoichiometric and catalytic isomerization of alkenylboranes using bulky Lewis bases
作者:Fu An Tsao、Anson Sathaseevan、Hui Zhu、Stefan Grimme、Gerhard Erker、Douglas W. Stephan
DOI:10.1039/c7cc04904h
日期:——
isomers of RCH = CR′B(C6F5)2 (R = (CH2)2Me, (CH2)3Me, (CH2)2Ph, CH2CHMe2, CHMe2, CMe3, CH2OMe, CH2N(CO)2C6H4), treatment of these alkenylboranes with stoichiometric or catalytic amounts of tBu2PH or other donors are shown to induce isomerization. The proposed mechanism involving a zwitterionic borataalkene intermediate is supported by computations.
与硼烷R'B炔烃的1,1- Carboboration(C 6 ˚F 5)2(R'=(CH 2)3博士,C 6 ˚F 5)所述的,得到的混合物Ë和Ž RCH = CR'B的异构体( C 6 F 5)2(R =(CH 2)2 Me,(CH 2)3 Me,(CH 2)2 Ph,CH 2 CHMe 2,CHMe 2,CMe 3,CH 2 OMe,CH 2 N(CO) )在2 C 6 H 4)中,显示出用化学计量或催化量的t Bu 2 PH或其他供体处理这些烯基硼烷会诱导异构化。计算结果支持了所提出的涉及两性离子硼烷基烯烃中间体的机理。