Carbocation Lewis Acid TrBF<sub>4</sub>-Catalyzed 1,2-Hydride Migration: Approaches to (<i>Z</i>)-α,β-Unsaturated Esters and α-Branched β-Ketocarbonyls
作者:Wansong Shang、Depeng Duan、Yongjun Liu、Jian Lv
DOI:10.1021/acs.orglett.9b03005
日期:2019.10.4
Carbocation Lewis acid TrBF4-catalyzed 1,2-hydride migration of α-alkyldiazoacetates themselves or in situ-generated cross-coupling adducts of aldehydes and α-alkyldiazoacetates has been developed, affording (Z)-α,β-unsaturated esters and α-branched β-ketocarbonyls, respectively, in good yields and with high regioselectivities.
已经开发出碳正离子路易斯酸TrBF 4催化α-烷基重氮乙酸酯本身或原位生成的醛与α-烷基重氮乙酸酯的交叉偶联加合物的1,2-氢化物迁移,提供了(Z)-α,β-不饱和酯和α -支链的β-酮羰基化合物,分别具有高收率和高区域选择性。