developed for the synthesis of diversely functionalized dihydro-2-oxypyrroles and tetrahydropyridines. One-pot four-component reaction of dialkyl acetylenedicarboxylates, amines and formaldehyde in the presence of 2,6-pyridinedicarboxylic acid in methanol at room temperature provides dihydro-2-oxypyrroles. The combination of β-ketoesters, aromatic aldehydes and amines yielded tetrahydropyridine derivatives
Coupling of amines, dialkyl acetylenedicarboxylates and formaldehyde promoted by [n-Bu4N][HSO4]: an efficient synthesis of highly functionalized dihydro-2-oxopyrroles and bis-dihydro-2-oxopyrroles
作者:Seyed Sajad Sajadikhah、Nourallah Hazeri
DOI:10.1007/s11164-012-0998-7
日期:2014.2
Abstract Tetrabutylammonium hydrogensulfate [ n -Bu4N][HSO4] is used as an efficientcatalyst for the one-pot, multi-component synthesis of highly substituted dihydro-2-oxopyrroles and bis-dihydro-2-oxopyrroles by means of reaction between amines, dialkyl acetylenedicarboxylates and formaldehyde in methanol at ambient temperature. This homogeneous catalyst procedure includes some important aspects
Abstract An efficientsynthesis of polysubstituted dihydropyrrol-2-one derivativesviaone-pot four-component domino reaction of amines, dialkylacetylenedicarboxylates and formaldehyde in the presence of zirconium tetrachloride (ZrCl4) is described. The presented methodology offers several advantages such as simplicity of operation, good to high yields, short reaction times, inexpensive and readily