Synthesis of Poly-(L-prolyl-L-leucyl-glycyl). An Attempted Synthesis of Model Collagen
作者:Hidetoshi Kitaoka、Shumpei Sakakibara、Hisaya Tani
DOI:10.1246/bcsj.31.802
日期:1958.7
The two tripeptides, l-prolyl-l-leucylglycine (IV) and glycyl-l-prolyl-l-leucine (X), were synthesized, and IV was subjected to polymerization by the tetraethyl pyrophosphite, carbodiimide and p-nitrophenyl thioester methods, in which the most promising result was obtained by the pyrophosphite method. The highest molecular weight of the polypeptide which was obtained was about 6000 and the repetition of the original tripeptide unit in the polypeptide was confirmed by the end groups determination. The polycondensation reactions of both the tripeptides, IV and X, were compared in parallel runs by the tetraethyl pyrophosphite procedure, and the comparison showed that IV gave a better yield and a higher molecular weight product than X. X and poly-(l-prolyl-l-leucyl-glycyl), which was obtained from IV, contained firmly bound water in spite of the fact that IV contained no crystallization water.
合成了两种三肽--l-脯氨酰-亮氨酰甘氨酸(IV)和甘氨酰-l-脯氨酰-亮氨酸(X),并用焦磷酸四乙酯法、碳化二亚胺法和对硝基苯硫酯法对 IV 进行了聚合,其中焦磷酸法的聚合效果最好。得到的多肽的最高分子量约为 6000,通过末端基团的测定,证实了多肽中原有三肽单元的重复。用焦磷酸四乙酯法对 IV 和 X 两种三肽的缩聚反应进行了平行比较,结果表明,IV 比 X 的产率更高、分子量更大。