2-Substituted-2,3-dihydro-1H-quinolin-4-ones via Acid-Catalyzed Tandem Rupe Rearrangement-Donnelly-Farrell Ring Closure of 2-(3′-Hydroxypropynyl)anilines
Highly Regioselective Indoline Synthesis under Nickel/Photoredox Dual Catalysis
作者:Sarah Z. Tasker、Timothy F. Jamison
DOI:10.1021/jacs.5b05597
日期:2015.8.5
Nickel/photoredoxcatalysis is used to synthesize indolines in one step from iodoacetanilides and alkenes. Very high regioselectivity for 3-substituted indoline products is obtained for both aliphatic and styrenyl olefins. Mechanistic investigations indicate that oxidation to Ni(III) is necessary to perform the difficult C-N bond-forming reductive elimination, producing a Ni(I) complex, which in turn
A variety of diversely substituted aryl triflate esters were efficiently deprotected to the parent phenols by exposure to cesium carbonate in toluene. This procedure proved highly compatible with existing functional groups. (C) 2013 Elsevier Ltd. All rights reserved.