Differences in reactivity of N-acetyl- and N,N-diacetylsialyl chlorides caused by their different supramolecular organization in solutions
作者:A. V. Orlova、T. V. Laptinskaya、N. V. Bovin、L. O. Kononov
DOI:10.1007/s11172-017-1999-x
日期:2017.11
O-Sialylation of a substituted indolin-3-one under phase-transfer catalysis conditions, which does not occur when N-acetylsialyl chloride is used, proceeds with N,N-diacetylsialyl chloride as the glycosyl donor. A study using dynamic light scattering of solutions of both sialyl chlorides under conditions close to the conditions used for glycosylation showed a difference in the correlation radii of light scattering
在相转移催化条件下取代 indolin-3-one 的 O-唾液酸化,在使用 N-乙酰唾液酸氯时不会发生,以 N,N-二乙酰唾液酸氯作为糖基供体进行。在接近糖基化条件的条件下使用两种唾液酰氯溶液的动态光散射的研究表明,此类溶液中光散射粒子的相关半径存在差异。这表明将额外的 N-乙酰基引入唾液酰氯显着改变了糖基供体的超聚体的结构,这显然增加了单个分子对亲核试剂攻击的可及性,从而增加了其反应性。