l-Ascorbic acid in organic synthesis: DBU-catalysed one-pot synthesis of tetramic acid derivatives from 5,6-O-isopropylidene ascorbic acid
作者:Biswajit K. Singh、Shyam S. Verma、Namrata Dwivedi、Rama P. Tripathi
DOI:10.1016/j.tetlet.2006.01.098
日期:2006.3
Reaction of 5,6-O-isopropylidene-2,3-bis-O-alkyl ascorbic acid with different amines in the presence of DBU at ambient temperature resulted in the formation of 3,4-bis-O-alkyl-l-alkyl-5-(2-hydroxy ethyl)-5-hydroxy-1,5-dihydropyrrol-2-ones in moderate yields. (c) 2006 Elsevier Ltd. All rights reserved.