Cobalt-Catalyzed Migration Isomerization of Dienes
作者:Jiajin Zhao、Guoxiong Xu、Xue Wang、Jiren Liu、Xiang Ren、Xin Hong、Zhan Lu
DOI:10.1021/acs.orglett.2c01701
日期:2022.7.1
multipositional isomerization of conjugateddienes has been reported for the first time using an 8-oxazoline iminoquinoline ligand. This reaction is operationally simple and atom-economical using readily available starting materials with an E/Z mixture to access disubstituted 1,3-dienes with excellent yields and good E,E stereoselectivity. The mechanism via alkene insertion of cobalt hydride species and β-H elimination
We developed Hg(OTf)2-catalyzed Friedel–Crafts-like cycloisomerization of 7-arylhepta-1,3-dienes to give propenyl-substituted tetrahydronaphthalenes in excellent catalytic turnover under very mild conditions. 1,3-Dienyl sulfonamides and 1,3-dienyl alcohols were also efficiently cyclized to afford heterocyclic compounds.