Polypeptides. Part XVIII. Syntheses of poly-(β-aspartic acid) and poly-(γ-glutamic acid) and their benzyl esters
作者:P. M. Hardy、J. C. Haylock、H. N. Rydon
DOI:10.1039/p19720000605
日期:——
L-aspartate) has been prepared by the polymerisation of α-benzyl β-N-succinimidyl L-aspartate and converted into poly-(β-L-aspartic acid) by hydrogenolysis; treatment of the poly(benzyl ester) with hydrogen bromide in acetic acid leads to a different polymer containing a substantial proportion of aspartimide residues. The analogous route cannot be used for the preparation of poly-(α-benzyl L-glutamate)
聚(α -苄基大号天冬氨酸)已被制备α -苄基β-的聚合Ñ琥珀酰亚胺大号天冬氨酸和转化成聚- (β-大号通过氢解-天冬氨酸); 在乙酸中用溴化氢对聚(苄基酯)进行处理可得到一种含有大量比例的天冬酰胺残基的不同聚合物。类似的方法不能用于制备聚-(α-苄基L-谷氨酸),最好通过αα'-二苄基γ- N-琥珀酰亚胺基γ - L-谷氨酰基-L-谷氨酸的聚合来制备。由聚(α-苄基L)获得聚(γ- L-谷氨酸)-谷氨酸盐)通过溴化氢在乙酸中的作用。多元酸的分子量为约11,000,并且没有消旋化伴随聚合。