One-potsynthesis of tetracyclic naphthoxazole derivatives from electron-deficient naphthoquinones and alkynes was achieved via Rh(III)-catalyzed C–Hactivation and Csp3–H bond cleavage for the first time. This approach proceeds through a tandem cascade process involving substrate tautomerization, C–Hactivation, oxidative addition, cyclization, and aromatization. In addition, broad substrate scope
A palladium-catalyzed decarbonylative annulation of 2-arylbenzoic acids with internal alkynes via C(sp2)–H activation has been developed. A series of phenanthrenes were produced in moderate to good yield with good functional group tolerance. The mechanism study indicated that the C(sp2)–H activation should be the rate-determining step during the reaction.
Electrochemical Oxidative 1,2-Dithiocyanation: Access to Functionalized Alkenes and Alkynes
作者:Ning Zhang、Zhen Cheng、Yu Xia、Ziren Chen、Fei Xue、Yonghong Zhang、Bin Wang、Shaofeng Wu、Chenjiang Liu
DOI:10.1021/acs.joc.4c00707
日期:2024.6.7
not only showed a broad substrate scope and good functional-group compatibility but also avoided stoichiometric oxidants. Different from previous reports, various internal alkynes could be tolerated to provide tetra-substituted alkenes. Further gram-scale-up experiments and synthetic transformation demonstrated a potential application in organicsynthesis. This process underwent a radical pathway, as