Synthesis of a Sialyl Lewis x Mimic with Fixed Carboxylic Acid Group: Chemical Approach toward the Elucidation of the Bioactive Conformation of Sialyl Lewis x
作者:Gebhard Thoma、Franz Schwarzenbach、Rudolf O. Duthaler
DOI:10.1021/jo951067l
日期:1996.1.1
The relation of the solution and bioactive conformation of sialyl Lewis x (sLe(x)) has been addressed by chemical means. To mimic the preferred solution conformation of sLe(x) 1, the more rigid analog 2 has been designed and synthesized. The sialic acid residue of 1 was replaced by a carboxylic acid function which is fixed in the equatorial position of a six membered ring acetal fused to galactose
溶液和唾液酸化的路易斯x(sLe(x))的生物活性构象之间的关系已通过化学方法解决。为了模拟sLe(x)1的最佳溶液构象,设计并合成了更刚性的类似物2。1的唾液酸残基被固定在与半乳糖融合的六元环缩醛的赤道位置的羧酸官能团取代。由于熵的考虑,如果优选的溶液构象和sLe(x)的结合形式相似,则有望提高生物活性。由于在E-选择素结合测定中发现模拟物2是无活性的,因此sLe(x)的结合形式很可能与当时的溶液构象不同。