Functionalization of Styrenes by Copper-Catalyzed Borylation/<i>ortho</i>-Cyanation and Silver-Catalyzed Annulation Processes
作者:Wanxiang Zhao、John Montgomery
DOI:10.1002/anie.201507303
日期:2015.10.19
N‐cyano‐N‐phenyl‐p‐methylbenzenesulfonamide (NCTS) to a broad range of styrenes by utilizing IMesCuCl as catalyst. This step simultaneously accomplishes hydroboration of the alkene and ortho cyanation of the benzene unit. The products thus obtained are further functionalized by a AgNO3/Selectfluor‐mediated coupling of the BPin and cyano functionalities to annulate a new five‐membered ring. This combined two‐step
Combined Cyanoborylation, C–H Activation Strategy for Styrene Functionalization
作者:Annabel Q. Ansel、John Montgomery
DOI:10.1021/acs.orglett.0c03138
日期:2020.11.6
A one-pot multicomponent copper-catalyzed protocol for borylation/ortho-cyanation of styrene derivatives followed by a Suzuki–Miyaura coupling provides a platform to explore the factors that control the selectivity between distal or proximal functionalization of arenes. The development of divergent nitrile-directed C–H functionalization (acetoxylation, pivalation, and methoxylation) offers an effective
Copper-Catalyzed Regioselective<i>ortho</i>CH Cyanation of Vinylarenes
作者:Yang Yang、Stephen L. Buchwald
DOI:10.1002/anie.201402449
日期:2014.8.11
A copper‐based catalytic technique for the regioselective ortho CH cyanation of vinylarenes has been developed. This method provides an effective means for the selective functionalization of vinylarene derivatives. A copper‐catalyzed cyanative dearomatization mechanism is proposed to account for the regiochemical course of this reaction.