Copper(I)-Catalyzed Highly Regio- and Stereoselective Boron Addition-Protonolysis of Alkynamides to give Alkenamides
作者:Guangke He、Qijun Zhang、Hai Huang、Shan Chen、Qiang Wang、Dongming Zhang、Rong Zhang、Hongjun Zhu
DOI:10.1002/ejoc.201300947
日期:2013.10
Copper-catalyzed and highly chemoselective reduction of N-alkynylamides by a boron addition–protonolysis protocol is presented. The reaction proceeds with the addition of boryl-copper complex to N-alkynylamides with high regioselectivity and stereoselectivity, followed by regiocontrolled transmetallation of the α-site of the alkenylboronate with MeOCuL to afford N-alkenylamides in good yields. Deuterium
提出了通过硼加成-质子分解方案对 N-炔基酰胺进行铜催化和高度化学选择性还原。该反应通过将硼基-铜配合物添加到具有高区域选择性和立体选择性的 N-炔基酰胺中进行,然后用 MeOCuL 对烯基硼酸酯的 α 位点进行区域控制的金属转移,以良好的产率得到 N-烯基酰胺。氘标记实验表明,两个烯基氢原子均来自添加剂甲醇。