Regioselective synthesis of isocoumarins by ruthenium-catalyzed aerobic oxidative cyclization of aromatic acids with alkynes
作者:Ravi Kiran Chinnagolla、Masilamani Jeganmohan
DOI:10.1039/c2cc16916a
日期:——
The highly regioselective aerobic oxidative cyclization of aromatic, heteroaromatic and alkenyl acids with alkynes in the presence of catalytic amounts of [RuCl2(p-cymene)}2], AgSbF6 and Cu(OAc)2·H2O providing isocoumarin derivatives was investigated.
Water as a green solvent for efficient synthesis of isocoumarins through microwave-accelerated and Rh/Cu-catalyzed C–H/O–H bond functionalization
作者:Qiu Li、Yunnan Yan、Xiaowei Wang、Binwei Gong、Xiaobo Tang、JingJing Shi、H. Eric Xu、Wei Yi
DOI:10.1039/c3ra43175d
日期:——
Green chemistry that uses water as a solvent has recently received great attention in organic synthesis. Here we report an efficient synthesis of biologically important isocoumarins through direct cleavage of C–H/O–H bonds by microwave-accelerated and Rh/Cu-catalyzed oxidative annulation of various substituted benzoic acids, where water is used as the only solvent in the reactions. The remarkable features
Cp*Co(III)-Catalyzed Annulation of Carboxylic Acids with Alkynes
作者:Rajib Mandal、Basker Sundararaju
DOI:10.1021/acs.orglett.7b00801
日期:2017.5.19
A new procedure for oxidative coupling of aromatic and acrylic acids with alkynes has been developed using abundant, nontoxic, and air stable Cp*Co(III) catalyst. The coupling involves initial cyclometalation via weak chelation-assisted C–H bond activation followed by alkyne coordination, insertion, and reductive elimination leading to diverse isocoumarins (α-pyranones) in good yields under mild conditions