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
The alpha-hydroxylation of ketones and aldehydes to alpha-hydroxyketals mediated by iodine under basic conditions in MeOH is described. Enolates generated under the reaction conditions are iodinated and the resulting alpha-iodocarbonyl is transformed into the hydroxyketal. The use of iodine for this chemistry represents an economical and practical alternative to existing methods for this transformation. (C) 2004 Elsevier Ltd. All rights reserved.
Boni Monica, Forti Luca, Gheifi Franco, Pagnoni Ugo M., Tetrahedron, 50 (1994) N 26, S 7897-7902
作者:Boni Monica, Forti Luca, Gheifi Franco, Pagnoni Ugo M.
DOI:——
日期:——
SHONO, TATSUYA;MATSUMURA, YOSHIHIRO;INOUE, KENJI;IWASAKI, FUMIAKI, J. CHEM. SOC. PERKIN TRANS., 1986, N 1, 73-77