Intramolecular Friedel–Crafts Acylation Reaction Promoted by 1,1,1,3,3,3-Hexafluoro-2-propanol
作者:Hashim F. Motiwala、Rakesh H. Vekariya、Jeffrey Aubé
DOI:10.1021/acs.orglett.5b02851
日期:2015.11.6
Simple dissolution of an arylalkyl acid chloride in 1,1,1,3,3,3-hexafluoro-2-propanol promotes an intramolecularFriedel–Craftsacylation without additional catalysts or reagents. This reaction is operationally trivial in both execution and product isolation (only requiring concentration followed by purification) and accommodates a broad range of substrates. Preliminary studies that bear upon potential
Direct Deoxygenative Intramolecular Acylation of Biarylcarboxylic Acids
作者:Chengjian Zhu、Jin Xie、Yantao Li、Wentao Xu
DOI:10.1055/s-0040-1707246
日期:2021.3
A photocatalyzed intramolecular cyclization is developed for the synthesis of fluorenones. In this photoredox reaction, triphenylphosphine is used as an inexpensive and effective deoxygenative reagent for biarylcarboxylic acids to give acyl radicals, which quickly undergo intramolecular radical cyclization. Reactions in the presence of air and continuous flow photoredox technology demonstrate the generality