An interrupted Heyns rearrangement approach for the regioselective synthesis of acylindoles
作者:Minakshi Altia、Pazhamalai Anbarasan
DOI:10.1039/d3cc04144a
日期:——
An efficient and general method for the synthesis of 2- and 3-acylindoles has been achieved with high regioselectivity from o-acylanilines and α-hydroxycarbonyl or its equivalent. The strategy involves the intramolecular trapping of an in situ generated aminoenol intermediate and an interrupted Heyns rearrangement pathway, followed by aromatization or rearrangement/aromatization. Important features
α-Hydroxydimethylacetal/ketal as an α-hydroxycarbonyl equivalent in interrupted Heyns/Amadori rearrangement: regioselective synthesis of substituted C2- and C3-acylindoles
作者:Minakshi Altia、Pazhamalai Anbarasan
DOI:10.1039/d4nj00771a
日期:——
intramolecular trapping of the aminoenol intermediate derived from o-acyl/formylanilines and α-hydroxydimethylacetals/ketals followed by rearrangement/aromatization in the presence of acid. Important features include the use of α-hydroxydimethylacetal/ketal as an α-hydroxycarbonyl equivalent, excellent regiocontrol, good functional group tolerance, selectivesynthesis of acylindoles, gram-scale synthesis, and
Reaction of Diphenacylanilines with 2-Aminobenzophenone: An Abnormal Friedlander Reaction Yielding Indoles
作者:Nidhin Paul、Shanmugam Muthusubramanian
DOI:10.1080/00397911.2011.627524
日期:2013.4.18
This article describes an abnormal Friedlander reaction between diphenacylaniline and 2-aminobenzophenone in the presence of a catalytic amount of (+/-)-camphorsulfonic acid yielding 2-aroyl-3-arylindoles in quantitative yield.Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.