A remarkable steric effect in palladium-catalyzed Grignard coupling: regio- and stereoselective monoalkylation and -arylation of 1,1-dichloro-1-alkenes
作者:Akio Minato、Keizo Suzuki、Kohei Tamao
DOI:10.1021/ja00238a052
日期:1987.2
concern in transition-metalcomplex catalyzed carbon-carbon bond-forming reactions. As part of their continued studies on the palladium-phosphine complex catalyzed selective monoalkylation of organic polyhalides, they report here the first success in the regio- and stereoselective monoalkylation and -arylation of 1,1-dichloro-1-alkenes by Grignard or organozinc reagents in the presence of (PdCl/sub2/(dppb))
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.