Synthesis of activated 3-substituted indoles: an optimised one-pot procedure
摘要:
3-Substituted-4,6-dimethoxyindoles can be synthesised in a one-pot procedure from 3,5-dimethoxyaniline and 2-haloketones in the presence of lithium bromide and sodium bicarbonate. (C) 2004 Elsevier Ltd. All rights reserved.
Iodine-mediated one-pot synthesis of indoles and 3-dimethylaminoindoles via annulation of enaminones
作者:Alberto V. Jerezano、Ehecatl M. Labarrios、Fabiola E. Jiménez、María del Carmen Cruz、Diana C. Pazos、Rsuini U. Gutiérrez、Francisco Delgado、Joaquín Tamariz
DOI:10.3998/ark.5550190.p008.138
日期:——
The synthesis of 2-carbonylindoles was achieved via a iodine-mediated cyclization of the corresponding enaminone precursors, which were form ed by reaction of the α-arylaminomethylene carbonyl derivatives with N,N′-dimethylformamide dimethyl acetal (DMFDMA). An alternative and more efficient procedure consisted of a similar cyclization of the enaminones, but under solvent-free and grinding reaction