Sequential C–H Functionalization Reactions for the Enantioselective Synthesis of Highly Functionalized 2,3-Dihydrobenzofurans
作者:Hengbin Wang、Gang Li、Keary M. Engle、Jin-Quan Yu、Huw M. L. Davies
DOI:10.1021/ja401731d
日期:2013.5.8
The enantioselectivesynthesis of 2,3-dihydrobenzofurans was achieved by using two sequential C-H functionalizationreactions, a rhodium-catalyzed enantioselective intermolecular C-H insertion followed by a palladium-catalyzed C-H activation/C-O cyclization. Further diversification of the 2,3-dihydrobenzofuran structures was possible by a subsequent palladium-catalyzed intermolecular Heck-type sp(2)
A new procedure for the synthesis of pinacols is established by way of oxidative coupling reaction of benzylethers with a thiyl radical, a hydrogen acceptor, generated from disulfide under UV irradiation.
Nickel-Catalyzed Ipso-Borylation of Silyloxyarenes via C–O Bond Activation
作者:Wesley L. Pein、Eric M. Wiensch、John Montgomery
DOI:10.1021/acs.orglett.1c01280
日期:2021.6.18
The conversion of silyloxyarenes to boronic acid pinacol esters via nickel catalysis is described. In contrast to other borylation protocols of inert C–O bonds, the method is competent in activating the carbon–oxygen bond of silyloxyarenes in isolated aromatic systems lacking a directing group. The catalytic functionalization of benzyl silyl ethers was also achieved under these conditions. Sequential