([TMBSED][OMs]2) was employed for the synthesis of piperidines and dihydropyrrol-2-ones via one-pot multi-component reactions in simple and green processes. This pseudo five-component reaction of aromatic aldehydes, anilines and alkyl acetoacetates was carried out under reflux conditions in ethanol to afford substituted piperidines. Also, dihydropyrrol-2-one derivatives were synthesized by means of four-component
Green and facile synthesis of dihydropyrrol-2-ones and highly substituted piperidines using ethylenediammonium diformate (EDDF) as a reusable catalyst
作者:Mahboobeh Zarei、Seyed Sajad Sajadikhah
DOI:10.1007/s11164-016-2512-0
日期:2016.9
Abstract Extremely facile and efficient procedures have been developed for the synthesis of dihydropyrrol-2-ones and highly substituted piperidines. One-pot four-component reaction of amines, dialkyl acetylenedicarboxylates, and formaldehyde in the presence of ethylenediammonium diformate in ethanol under reflux conditions provides N-aryl-3-amino dihydropyrrol-2-one-4-carboxylates in good to high yields
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