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 efficient and straightforward procedure has been developed for the synthesis of highly substituted mono- and bis- N -aryl-3-aminodihydropyrrol-2-one-4-carboxylates via a one-pot, four-component domino reaction of amines, dialkyl acetylenedicarboxylates and formaldehyde in the presence of InCl 3 (20 mol%) in MeOH at ambient temperature. The salient advantages of this method are mild reaction