aldimines took place smoothly in aqueous organic solvent to afford β-aminocarbonyl compounds in high yields. The HBF4-catalyzed Mannich-type reaction also proceeded smoothly in water without organic solvent in the presence of a surfactant. A three-component synthesis starting from aldehyde, amine, and silyl enolate was successfully realized by means of a Bronsted acid in aqueous media.
An efficient and mild bismuth triflate-catalysed three-component Mannich-type reaction
作者:Thierry Ollevier、Etienne Nadeau
DOI:10.1039/b710794c
日期:——
In the presence of a catalytic amount of Bi(OTf)(3).4H(2)O, aldehydes together with amines react with silylenolates to afford the corresponding Mannich-type adducts smoothly. A wide variety of silylenolates derived from ketones, as well as esters and thioesters, react rapidly to afford the beta-amino ketones or the beta-amino esters in high yields (up to 94%).
Highly Efficient Fe(HSO<sub>4</sub>)<sub>3</sub>-Catalyzed One-Pot Mannich-Type Reactions: Three Component Synthesis of β-amino Carbonyl Compounds
作者:Hossein Eshghi、Afsaneh Alipour、Saman Damavandi
DOI:10.1080/15533174.2011.555858
日期:2011.4.11
Fe(HSO4)3-catalyzed three-component one-pot Mannich reaction of acetophenone with different aromatic aldehydes and aromatic amines in ethanol at ambient temperature afforded the corresponding -aminocarbonyl compounds in very good to excellent yields. Short reaction time, excellent yield, easy work-up procedure, applicability of using various amines and aldehydes, capability of conversion of ortho-substituted
Molecular Iodine-Catalyzed Imine Activation for Three-Component Nucleophilic Addition Reactions
作者:Kim Janda、Byoung Lee、Suresh Mahajan
DOI:10.1055/s-2005-868487
日期:——
β-Amino ketones and α-amino nitriles were synthesized from silyl enol ethers and trimethylsilyl cyanides, via a three-component nucleophilicadditionreaction with aromaticaldehydes and amines; the reaction was found to be significantly accelerated by molecular iodine under neutral conditions.
Bismuth triflate catalyzes the Mannich-typereaction of a variety of in situ generated aldimines using aldehydes, anilines, and silyl enol ethers in a three-componentreaction. The reaction proceeds rapidly and affords the corresponding protected β-amino ketones in high yields (up to 94%).