Olefin–Borane “van der Waals Complexes”: Intermediates in Frustrated Lewis Pair Addition Reactions
作者:Xiaoxi Zhao、Douglas W. Stephan
DOI:10.1021/ja205598k
日期:2011.8.17
The nature of the borane-olefin interactions that take place prior to frustratedLewispair addition reactions has been probed employing a Lewis acidic borane tethered to a vinyl group through an alkyl chain. (1)H(19)F} HOESY spectral data obtained at -50 °C demonstrated the spatial proximity of the boryl and vinyl groups and computational data support the initial formation of a van der Waals borane-olefin
在受挫的路易斯对加成反应之前发生的硼烷-烯烃相互作用的性质已经使用通过烷基链连接到乙烯基的路易斯酸性硼烷进行了探测。(1)H(19)F} 在 -50 °C 下获得的 HOESY 光谱数据表明硼基和乙烯基在空间上接近,计算数据支持范德华硼烷-烯烃复合物的初始形成。此类物质用作中间体,与膦碱进行简单的加成反应以提供环状两性离子产物。