Palladium-Catalyzed Direct C–H Bond Alkynylations of Heteroarenes Using gem-Dichloroalkenes
摘要:
Palladium-catalyzed direct alkynylations of heteroarenes were accomplished with inexpensive gem-dichloroalkenes as user-friendly electrophiles, which set the stage for a modular, step-economical synthesis of diversely decorated heteroaryl alkynes with ample scope.
AbstractThe rhodium(I)‐catalyzed reaction between arylboronic esters and excess 1,2‐dichloroethene selectively afforded (2‐chlorovinyl)arenes. Double arylation yielding 1,2‐diarylethenes was observed when 1,2‐dibromoethene was reacted with 2.5 equivalents of arylboronic acid.magnified image
Chemo- and regioselective synthesis of polysubstituted 2-aminothiophenes by the cyclization of<i>gem</i>-dibromo or<i>gem</i>-dichloroalkenes with β-keto tertiary thioamides
作者:Xuxue Zhang、Chuan Liu、Yupian Deng、Song Cao
DOI:10.1039/d0ob01821j
日期:——
A facile and practical method for the synthesis of 2,3,4-trisubstituted 2-aminothiophenes by the cyclization ofgem-dibromoalkenes orgem-dichloroalkenes with β-keto tertiary thioamides has been developed.
Pd(OAc)<sub>2</sub>/SPPh<sub>3</sub> accelerated activation of gem-dichloroalkenes for the construction of 3-arylchromones
作者:Jianming Liu、Weiwei Song、Yuanyuan Yue、Ren Liu、Hong Yi、Kelei Zhuo、Aiwen Lei
DOI:10.1039/c5cc06334e
日期:——
The Pd-catalyzed regioselective intramolecular nucleophilic substitution of gem-dichloroalkene derivatives with salicylaldehydes leading to the synthesis of 3-arylchromones has been developed.
Nickel-Catalyzed Cascade Reaction of 2-Vinylanilines with <i>gem</i>-Dichloroalkenes
作者:Jin Lin、Chaoyi Wu、Xu Tian
DOI:10.1021/acs.orglett.2c01492
日期:2022.7.15
An efficientnickel-catalyzed cascade reaction of 2-vinylanilines with gem-dichloroalkenes has been developed to deliver diversely substituted quinolines in good to high yields. This protocol enables effective access to quinolines bearing various functional groups in the cascade process from readily available feedstock chemicals. Mechanistic studies suggest that two plausible pathways are involved