Lithium Borohydride for Achiral and Stereospecific Reductive Boronation at Phosphorus: Lack of Electronic Effects on Stereoselective Formation of Alkoxyphosphonium Salts
作者:Sulaiman S. Al Sulaimi、Kamalraj V. Rajendran、Declan G. Gilheany
DOI:10.1002/ejoc.201500521
日期:2015.9
as a preferred, simple and effective reagent for reductive boronation of achiral and racemic chlorophosphonium salts (CPS) and for diastereomeric alkoxyphosphonium salts (DAPS), both of which are, in turn, easily generated from either the corresponding phosphane or, more conveniently, the phosphane oxide. Further, we have shown that the DAPS reduction/boronation could be achieved with complete stereocontrol
我们报告了 LiBH4 作为一种优选的、简单且有效的试剂,用于非手性和外消旋氯鏻盐 (CPS) 和非对映异构烷氧基鏻盐 (DAPS) 的还原硼化,而这两者又很容易从相应的磷烷或更多方便地,磷烷氧化物。此外,我们已经表明,可以通过完全立体控制来实现 DAPS 还原/硼化,以优异的产率和对映体过量 (ee) 直接得到比例级磷烷 - 硼烷。这种新方法用于研究芳基取代对通过 DAPS 对芳基甲基苯基膦和氧化膦动态拆分结果的影响。发现邻位取代强烈影响立体选择的程度。然而,令人惊讶的是,