Azomethines derived from aniline were condensed with acetophenone derivatives to obtain new unsymmetrical beta-arylaminoketones.
Supramolecular Assemblies in Ionic Liquid Catalysis for Aza-Michael Reaction
作者:Sudipta Raha Roy、Asit K. Chakraborti
DOI:10.1021/ol101557t
日期:2010.9.3
Supramolecular assemblies formed by a relay of cooperative hydrogen bonds and charge charge interactions have been identified/characterized by (+ve) ESI and MALDI-TOF-TOF MS and MS-MS studies during the aza-Michael reaction of amines with alpha,beta-unsaturated carbonyl compounds in the presence of ionic liquids (ILs) digging out the role of catalysis by ILs, forming the basis of rational design/selection as organocatalysts, and offering a diagnostic model to predict/rationalize the selectivity of the aza-Michael reaction in a competitive environment.
Tuning Microenvironment of Quaternary Ammonium Salt and Tertiary Amine Bifunctionalized Polyacrylonitrile Fiber for Cooperatively Catalyzed Aza-Michael Addition
A series of novel polyacrylonitrile fiber catalysts modified with different ratio of quaternary ammonium salt (QA) to tertiaryamine (TA) were screened for heterogeneously catalyzed aza-Michael addition in water. The best catalyst was found to be PANPQ-1F with a QA:TA ratio of 1:1, which can lead to high yield, excellent selectivity of solvent and great recyclability under optimized conditions. The