Highly stereoselective synthesis of (Z)-1,2-dihaloalkenes by a Pd-catalyzed hydrohalogenation of alkynyl halides
作者:Gangguo Zhu、Dongxu Chen、Yuyi Wang、Renwei Zheng
DOI:10.1039/c2cc31553j
日期:——
An unprecedented Pd-catalyzed hydrohalogenation of alkynyl halides for the regio- and stereoselective synthesis of (Z)-1,2-dihaloalkenes has been realized using [(allyl)PdCl]2 as the catalyst and cis,cis-1,5-cyclooctadiene as the ligand. The advantages of this protocol are well illustrated by the assembly of trisubstituted (Z)-enynes and multifunctional benzenes via iterative cross-coupling reactions or tandem Diels–Alder–aromatization reactions, respectively.
一种前所未有的钯催化的炔基卤化物的氢卤化反应已经实现,能够区域和立体选择性合成(Z)-1,2-二卤烯,使用的催化剂为[(烯丙基)PdCl]2,配体为顺,顺-1,5-环辛二烯。该方法的优势通过迭代交叉偶联反应组装三取代的(Z)-烯炔和通过串联的Diels–Alder–芳构化反应组装多功能苯烃得到了很好的体现。