Cellulose-SO3H as a biodegradable solid acid catalyzed one-pot three-component Ugi reaction: Synthesis of α-amino amide, 3,4-dihydroquinoxalin-2-amine, 4H-benzo[b][1,4]thiazin-2-amine and 1,6-dihydropyrazine-2,3-dicarbonitrile derivatives
摘要:
A variety of amines has become utilized in the three-compound Ugi reaction and synthesis of 3,4-dihydroquinoxalin-2-amine, 4H-benzo[b][1,4]thiazin-2-amine and 1,6-dihydropyrazine-2,3-dicarbonitrile derivatives in the presence of cellulose sulfuric acid as a biopolymer solid acid catalyst in ethanol at room temperature. (c) 2012 Elsevier B.V. All rights reserved.