l-Ascorbic acid in organic synthesis: a facile synthesis of 4-(butenolide-5-methylidenyl)-1,4-dihydropyridines
作者:Surendra S. Bisht、Namrata Dwivedi、Rama P. Tripathi
DOI:10.1016/j.tetlet.2006.12.067
日期:2007.2
efficient synthesis of 4-(butenolide-5-methylidenyl)-1,4-dihydropyridines has been achieved via a three-component reaction of β-keto esters or ketones, ammonium acetate and vinylic aldehydesfrom ascorbic acid in the presence of tetrabutylammonium hydrogen sulfate in ethylene glycol.