Organocatalytic
<i>trans</i>
Phosphinoboration of Internal Alkynes
作者:Russell G. Fritzemeier、Jan Nekvinda、Christopher M. Vogels、Carol Ann Rosenblum、Carla Slebodnick、Stephen A. Westcott、Webster L. Santos
DOI:10.1002/anie.202006096
日期:2020.8.17
We report the first trans phosphinoboration of internal alkynes. With an organophosphine catalyst, alkynoate esters and the phosphinoboronate Ph2P‐Bpin are efficiently converted into the corresponding trans‐α‐phosphino‐β‐boryl acrylate products in moderate to good yield with high regio‐ and Z‐selectivity. This reaction operates under mild conditions and demonstrates good atom economy, requiring only
我们报告了内部炔烃的第一次反式膦酰硼化。使用有机膦催化剂,可以将烷基酸酯和膦基硼酸酯Ph 2 P-Bpin有效地转化为相应的反式-α-膦基-β-硼丙烯酸酯产品,并具有较高的区域选择性和Z选择性。该反应在温和的条件下进行,显示出良好的原子经济性,仅需要适度过量的膦基硼酸酯。X射线晶体学实验允许对史无前例的,高度致密的(Z)-α-膦基-β-硼丙烯酸酯产品进行结构分配。