anti-1,2-diarylation of diarylacetylenes is described. The key intermediates, trans-1,2-dizincioalkenes, are prepared by sodium-promoted reductive anti-1,2-dimagnesiation of alkynes and the subsequent transmetallation to zinc. The present reaction enables the stereoselective synthesis of tetraarylethylenes which have been difficult to prepare according to the conventional methods.
描述了
钯催化的二芳基
乙炔的 反-1,2-二芳基化。关键中间体反式-1,2-二
锌烯烃是通过
钠促进的
炔烃的还原反-1,2-二
镁化反应和随后的
金属转移反应生成
锌来制备的。本反应能够立体选择性合成传统方法难以制备的四芳基
乙烯。