生产了由MCM-48 / H 5 PW 10 V 2 O 40组成的非均质材料,并将其用作高效,生态友好且高度可回收的催化剂,用于3,4-二氢喹喔啉-2-胺的一锅多组分合成,二氮杂-四唑和苯并二氮杂-2-羧酰胺衍生物在水性介质中和室温下以高收率在较短的反应时间(40-60分钟)内产生。可回收的催化剂易于循环至少五次,而没有任何催化活性的损失。使用1 H NMR和13 C NMR光谱确认获得的产物的结构。
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
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.