Solvent-free heterogeneous organocatalysis: stereoselective isomerization of α,β-ynones to (E,E)-α,β-γ,δ-dienones catalyzed by polymer-supported tertiaryphosphines
摘要:
Stereoselective isomerization of alpha, beta-ynones was catalyzed by polymer-supported tertiaryphosphines under solvent-free conditions. (E, E)-alpha, beta-gamma, delta-Dienones were obtained with up to 93% isolated yields when JJ-TPP was employed. (c) 2007 Elsevier Ltd. All rights reserved.
Carbonylative Sonogashira Coupling of Terminal Alkynes with Aqueous Ammonia
作者:Mohamed S. Mohamed Ahmed、Atsunori Mori
DOI:10.1021/ol035007a
日期:2003.8.1
graphicCarbonylative coupling of phenylethyne with 4-methoxy-1-iodobenzene in the presence of 1 mol % PdCl2(PPh3)2, 2 equiv of 0.5 M aqueous ammonia, and CO (1 atm) gives the corresponding alpha,beta-alkynyl ketone in 72% isolated yield after stirring at room temperature for 41 h, while noncarbonylative coupling product is not obtained.