The gold-catalysed direct couplings of indoles 1 and pyrroles 5 with 1,3-dicarbonyls 2 is described. This new method for CC bond formation allows high functional group tolerance, regioselectivity, and scope under relatively mild conditions. Moreover, the 3-alkenylindoles 3 can be readily available through gold-catalysed sequential cyclization/alkenylation reaction of 2-alkynylanilines derivatives 4
FeCl3-catalyzed alkylation of indoles with 1,3-dicarbonyl compounds: an expedient synthesis of 3-substituted indoles
作者:J.S. Yadav、B.V. Subba Reddy、K. Praneeth
DOI:10.1016/j.tetlet.2007.09.166
日期:2008.1
Indoles undergo smooth alkylation at the 3-position with 1,3-dicarbonyl compounds in the presence of 20 mol % of FeCl3 under mild reaction conditions to produce a wide range of 3-substituted indoles in excellent yields and with high E-selectivity. (c) 2007 Elsevier Ltd. All rights reserved.
Hammouda, M., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1993, vol. 32, # 11, p. 1181 - 1184
作者:Hammouda, M.
DOI:——
日期:——
Task-specific ionic liquid-catalyzed efficient couplings of indoles with 1,3-dicarbonyl compounds: an efficient synthesis of 3-alkenylated indoles
作者:Sougata Santra、Adinath Majee、Alakananda Hajra
DOI:10.1016/j.tetlet.2011.05.069
日期:2011.7
Direct alkenylation of indoles at the 3-position with 1,3-dicarbonyl compounds under Bronsted acidic ionic liquid catalysis has been developed. The yields were excellent, and the catalyst can be reused at least six times without noticeable loss of catalytic activity. (C) 2011 Elsevier Ltd. All rights reserved.