CHEMICAL MODIFICATION OF PULLULAN .2. CHLOROFORMATE ACTIVATION

被引:37
作者
BRUNEEL, D [1 ]
SCHACHT, E [1 ]
机构
[1] STATE UNIV GHENT, ORGAN CHEM LAB, KRIJGSLAAN 281 S4, B-9000 GHENT, BELGIUM
关键词
4-NITROPHENYL CHLOROFORMATE; PULLULAN; AMINATED PULLULAN; STRUCTURAL ANALYSIS; NMR STUDY;
D O I
10.1016/0032-3861(93)90601-6
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The present paper describes the chloroformate activation of pullulan by reaction with 4-nitrophenyl chloroformate. N.m.r. analysis indicated that the ester formation takes place preferentially at the C6 hydroxy groups of pullulan. It was further demonstrated that activation gives linear carbonates, aliphatic carbonates including cyclic five-membered carbonates, and non-strained aliphatic carbonates. All of these carbonates react with amines to yield the corresponding urethane derivatives. The 4-nitrophenyl chloroformate activation of pullulan is an easy method for obtaining amine-containing pullulan derivatives.
引用
收藏
页码:2633 / 2637
页数:5
相关论文
共 21 条