Cu(I)-Catalyzed Cross-Coupling of Terminal Alkynes with Trifluoromethyl Ketone <i>N</i>-Tosylhydrazones: Access to 1,1-Difluoro-1,3-enynes
作者:Zhikun Zhang、Qi Zhou、Weizhi Yu、Tianjiao Li、Guojiao Wu、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.orglett.5b00980
日期:2015.5.15
elimination have been achieved in a Cu(I)-catalyzed cross-coupling reaction of terminal alkynes and trifluoromethyl ketone N-tosylhydrazones. The reaction represents an efficient synthesis of 1,1-difluoro-1,3-enyne derivatives. Mechanistically, the migratory insertion of the copper carbene intermediate leads to the C–C bond formation, which is followed by C–F bond cleavage.
Cu(I)-Catalyzed Three-Component Coupling of Trifluoromethyl Ketone<i>N</i>-Tosylhydrazones, Alkynes and Azides: Synthesis of Difluoromethylene Substituted 1,2,3-Triazoles
作者:Zhikun Zhang、Qi Zhou、Weizhi Yu、Tianjiao Li、Yan Zhang、Jianbo Wang
DOI:10.1002/cjoc.201600888
日期:2017.4
A CuI‐catalyzedthree‐component coupling of trifluoromethyl ketone N‐tosylhydrazones, alkynes and azides has been developed. The reactionrepresents a straightforward method to access difluoromethylene substituted 1,2,3‐triazoles. Mechanistically, it has been proposed that the reaction follows a pathway involving the formation of Cu(I)triazolide intermediate, Cu(I) carbene formation, migratory insertion