A new synthesis of indoles via intramolecular cyclization of ο-alkynyl N,N-dialkylanilines promoted by KOt-Bu/DMSO
摘要:
2-Aryl indoles could be prepared in excellent yields via the intramolecular cyclization of o-alkynyl N,N-dialkylanilines. The reaction is efficiently promoted by the catalytic amount of KOr-Bu in DMSO at room temperature. A reaction mechanism involving alpha-aminoalkyl radical intermediates is suggested. (C) 2012 Elsevier Ltd. All rights reserved.
Divergent Syntheses of Indoles and Quinolines Involving N1–C2–C3 Bond Formation through Two Distinct Pd Catalyses
作者:Su San Jang、Young Ho Kim、So Won Youn
DOI:10.1021/acs.orglett.0c02898
日期:2020.12.4
annulative couplings of 2-alkenylanilines with aldehydes using alcohols as both the solvent and hydrogen source have been developed. These domino processes allow divergent syntheses of two significant N-heterocycles, indoles and quinolines, from the same substrate by tuning reaction parameters, which seems to invoke two distinct mechanisms. The nature of the ligand and alcoholic solvent had a profound