Switchable Synthesis of Arylalkynes and Phthalides via Controllable Palladium-Catalyzed Alkynylation and Alkynylation–Annulation of Benzoic Acids with Bromoalkynes
作者:Shuai Shi、Cui-Hong Chen、Yun Chai、Li-Ting Zhang、Jia-Wei Li、Bin Liu、Yue-Jin Liu、Ming-Hua Zeng
DOI:10.1021/acs.joc.9b01102
日期:2019.7.19
palladium(II)-catalyzed synthesis of arylalkynes and phthalides from benzoic acids and bromoalkynes via carboxylate-assisted ortho-C–H activation is reported. A series of phthalides with various functional groups are prepared via ortho-alkynylation and alkynylation–annulation. Moreover, the key ortho-alkynylated products are also obtained by controlling the reaction conditions. In addition, heteroaryl acids could react
据报道,配体促进了钯(II)通过羧酸辅助邻-C-H活化,由苯甲酸和溴代炔烃合成芳基炔烃和邻苯二甲酸酯。通过邻-炔基化和炔基化-环化反应制得一系列具有各种官能团的邻苯二甲酸酯。而且,通过控制反应条件也可以得到关键的邻炔基化产物。另外,杂芳基酸可以平稳地反应形成相应的炔基化和环化产物。