Four-component coupling of amines, aldehydes, 1,3-dicarbonyl compounds, and nitromethane has been achieved in gluconic acid aqueous solution (GAAS) to produce polysubstituted pyrroles in high yield. Gluconic acid aqueous solution could be recycled and reused several times without significant loss of its efficiency. (C) 2013 Elsevier Ltd. All rights reserved.
Multicomponent Approach Towards the Synthesis of Substituted Pyrroles under Supramolecular Catalysis Using<i>β</i>-Cyclodextrin as a Catalyst in Water Under Neutral Conditions
Synthesis of substitutedpyrroles in H2O by using β‐cyclodextrin as a supramolecularcatalyst is described. This reaction has several advantages over existing methods and provides substitutedpyrroles in good‐to‐excellent yields (79–89%). The supramolecularcatalysis of the reaction was studied using 1H‐NMR spectroscopy. β‐Cyclodextrin can be recovered and reused several times without loss of activity