Oxidative Annulation of Arenecarboxylic and Acrylic Acids with Alkynes under Ambient Conditions Catalyzed by an Electron-Deficient Rhodium(III) Complex
It has been established that an electron‐deficient CpE rhodium(III) complex catalyzes the oxidative [4+2] annulation of substituted arenecarboxylic and acrylic acids with alkynes under ambient conditions (at RT–40 °C, under air) without using excess amounts of substrates to produce the corresponding substituted isocoumarins and α‐pyrones in high yields. Minor modification of reaction conditions depending
Rhodium(III)-Catalyzed C–H Activation/Alkyne Annulation by Weak Coordination of Peresters with O–O Bond as an Internal Oxidant
作者:Jiayu Mo、Lianhui Wang、Xiuling Cui
DOI:10.1021/acs.orglett.5b02291
日期:2015.10.16
A redox-economic strategy has been developed, involved in an efficient Rh(III)-catalyzed oxidative C–H activation and alkyneannulation with perester as the oxidizing directing group. In this process, the cleavage of an oxidizing O–O bond as an internal oxidant is described for the first time. This reaction could be carried out under mild conditions and exhibits excellent regioselectivity and wide