Highly Efficient One-Pot Three-Component Mannich Reaction in Water Catalyzed by Heteropoly Acids
作者:Najmodin Azizi、Lalleh Torkiyan、Mohammad R. Saidi
DOI:10.1021/ol060498v
日期:2006.5.1
[reaction: see text] Heteropoly acidsefficiently catalyzed the one-pot, three-component Mannichreaction of ketones with aromatic aldehydes and different amines in water at ambient temperature and afforded the corresponding beta-amino carbonyl compounds in good to excellent yields and with moderate diastereoselectivity. This method provides a novel and improved modification of the three-component
An effective polyelectrolyte Bronsted acid (polyacrylic acid) catalyzed three-componentMannichreactions accelerated by emulsion has been developed. The results demonstrated that the polyacrylic acid provided the best catalytic activity in...
AbstractThe current study deals with the applications of a surfactant-like Brønstedacidicionicliquid (IL) 1-dodecyl-3-methylimidazolium hydrogen sulfate ([DMIm]HSO4) for Mannich reaction at room temperature. The reaction was efficiently preceded in water as solvent without using any harmful and expensive organic additives. Our findings showed that the reaction is selective for cyclohexanone and
Bismuth triflate catalyzed direct-type Mannich reaction of cyclohexanone, aromatic aldehyde, and aromatic amine proceeded smoothly in water to afford the corresponding beta-amino ketone with very good yield and moderate to good anti selectivity. (c) 2006 Elsevier Ltd. All rights reserved.