Rhodium- and Iridium-Catalyzed Oxidative Coupling of Benzoic Acids with Alkynes via Regioselective C−H Bond Cleavage
作者:Kenji Ueura、Tetsuya Satoh、Masahiro Miura
DOI:10.1021/jo070735n
日期:2007.7.1
coupling of benzoicacids with internal alkynes effectively proceeds in the presence of [Cp*RhCl2]2 and Cu(OAc)2·H2O as catalyst and oxidant, respectively, to produce the corresponding isocoumarin derivatives. The copper salt can be reduced to a catalytic quantity under air. Interestingly, by using [Cp*IrCl2]2 in place of [Cp*RhCl2]2, the substrates undergo 1:2 coupling accompanied by decarboxylation to afford