The reaction of aldehydes with beta-dicarbonyls and electron-rich aromatics was investigated to generate in a multicomponent fashion crossed adducts of biological relevance. 4-Hydroxycoumarin, triacetic acid lactone, indole, and a selection of aliphatic and aromatic aldehydes representative of various electronic and steric conditions were employed. The reaction showed a surprising dependence on the solvent, with 1:1 chloroform-water giving the best yield of heterodimeric adducts. The mechanistic rationale for the formation of hetero- rather than homodimeric adducts is discussed. (C) 2009 Elsevier Ltd. All rights reserved.
l-Proline catalyzed multicomponent one-pot synthesis of gem-diheteroarylmethane derivatives using facile grinding operation under solvent-free conditions at room temperature
作者:Goutam Brahmachari、Suvankar Das
DOI:10.1039/c3ra44568b
日期:——
straightforward L-proline catalyzedone-potsynthesis of a series of biologically relevant gem-(β-dicarbonyl)arylmethanes has been developed via a three-component reaction between indoles, aldehydes and C–H activated acids by grinding them together under solvent-free conditions at room temperature. Mild reaction conditions, high atom-economy, good yields, and eco-friendliness are some of the salient