The Condensation of Carbonyl Compounds with Electron-Rich Arenes: Mercury, Thallium, Gold or a Proton?
作者:A. Stephen K. Hashmi、Lothar Schwarz、Philipp Rubenbauer、M. Carmen Blanco
DOI:10.1002/adsc.200505464
日期:2006.4
Gold(III) chloride, mercury(II) perchlorate, thallium(III) perchlorate and p-toluenesulfonic acid were found to efficiently catalyze the condensation of two furans with aldehydes or acetone. The olefinic unit of α,β-unsaturated carbonyl compounds reacts faster than the carbonyl group, other olefins do not react selectively. The first (addition) step is rate-limiting, the second (substitution) step
AlCl3 as a powerful catalyst for the one-pot preparation of 1,1,3-triheteroaryl compounds
作者:Morteza Shiri、Mohammad Ali Zolfigol、Roya Ayazi-Nasrabadi
DOI:10.1016/j.tetlet.2009.10.127
日期:2010.1
A general and efficient procedure for the synthesis of 1,1,3-triheteroaryl compounds in good to excellent yield at room temperature is developed. The reaction proceeds via mixed Michael and Friedel-Crafts reactions of alpha,beta-enals or alpha,beta-enones and indoles, 2-methylfuran or 2-methylthiophene in the presence of a catalytic amount of AlCl3. (C) 2009 Elsevier Ltd. All rights reserved.