作者:Raju S. Thombal、Vrushali H. Jadhav
DOI:10.1080/07328303.2015.1120874
日期:2016.1.2
Heterogeneous sulfonated graphene oxide for the first time has been used as a green and efficient catalyst for atom-economic glycosylation of unprotected, unactivated glycosyl donors or 2,3,4,6-tetra-O-acetylglycosyltrichloroacetimidate with various acceptors basically in the absence of solvent. The unprotected, unactivated glycosyl donors afforded mixtures of α- and β-glycosides, while the 2,3,4,
基本上,在不存在任何保护基的情况下,非均相磺化氧化石墨烯已被首次用作未受保护的,未活化的糖基供体或带有各种受体的2,3,4,6-四-O-乙酰基糖基三氯乙酰胺酸酯的原子经济糖基化的绿色高效催化剂。溶剂。未保护的,未活化的糖基供体提供了α-和β-糖苷的混合物,而2,3,4,6-四-O-乙酰基糖基三氯乙酰胺酸酯提供了高收率和高选择性的β-糖基化产物。这种方法的主要优点是易于制备催化剂,无需干燥试剂和反应条件,易于催化剂分离和再循环以及高产物收率。