Structurally Diverse α-Substituted Benzopyran Synthesis through a Practical Metal-Free C(sp<sup>3</sup>)–H Functionalization
作者:Wenfang Chen、Zhiyu Xie、Hongbo Zheng、Hongxiang Lou、Lei Liu
DOI:10.1021/ol503004a
日期:2014.11.21
A trityl ion-mediated practical C–H functionalization of a variety of benzopyrans with a wide range of nucleophiles (organoboranes and C–H molecules) at ambient temperature has been disclosed. The metal-free reaction has an excellent functional group tolerance and high chemoselectivity and displays a broad scope with respect to both benzopyran and nucleophile partners, efficiently affording a collection
Catalytic Enantioselective Oxidative Cross-Coupling of Benzylic Ethers with Aldehydes
作者:Zhilin Meng、Shutao Sun、Huiqing Yuan、Hongxiang Lou、Lei Liu
DOI:10.1002/anie.201308701
日期:2014.1.7
The first one‐pot enantioselectiveoxidative coupling of cyclic benzylicethers with aldehydes has been developed. A variety of benzylicethers were transformed into the corresponding oxygen heterocycles with high enantioselectivity. Mechanistic experiments were conducted to determine the nature of the reaction intermediates. The application of this strategy to coupling reactions with other nucleophiles
incorporation of fluorine atoms into aromatic rings or heterocycles can lead to significant improvements in the physicochemical and biological properties of small molecules, making them valuable components in the design of new drugs and functional materials. Herein, we presented a cobalt-catalyzed C–H oxidation/gem-difluorination cascade reaction of readily available cyclicethers with difluoroenoxysilanes