Rh(II)-catalyzed enantioselective synthesis of acuminatin through a C–H insertion reaction of a non-stabilized carbenoid
作者:Cristóbal López-Sánchez、Míriam Álvarez-Corral、Leticia Jiménez-González、Manuel Muñoz-Dorado、Ignacio Rodríguez-García
DOI:10.1016/j.tet.2013.04.086
日期:2013.7
An efficient and practical asymmetric synthesis of the 2,3-dihydrobenzo[b]furan neolignan acuminatin was achieved by using trans-isoeugenol as the starting material. The key step is an intramolecular C-H insertion through a non-stabilized carbenoid, prepared by decomposition of a tosylhydrazone in the presence of an anthracenyl-derived cinchonidine quaternary ammonium salt as a chiral phase-transfer catalyst. (C) 2013 Elsevier Ltd. All rights reserved.