9-Azido-9-deoxy-2,3-difluorosialic Acid as a Subnanomolar Inhibitor against Bacterial Sialidases
作者:Wanqing Li、Abhishek Santra、Hai Yu、Teri J. Slack、Musleh M. Muthana、Dashuang Shi、Yang Liu、Xi Chen
DOI:10.1021/acs.joc.9b00385
日期:2019.6.7
several bacterial sialidases and a recombinant human cytosolic sialidase hNEU2 indicated that sialidase inhibition was affected by the C-3 fluorine stereochemistry and derivatization at C-5 and/or C-9 of the inhibitor. Opposite to that observed for influenza A virus sialidases and hNEU2, compounds with axial fluorine at C-3 were better inhibitors (up to 100-fold) against bacterial sialidases compared to
化学合成了2(a),3(a / e)-二氟唾液酸及其C-5和/或C-9衍生物的文库。多杀巴斯德氏菌唾液酸醛缩酶(PmAldolase),但不包括其大肠杆菌同源物(EcAldolase),被发现催化3-氟(a)-唾液酸的C5-叠氮基类似物的形成。相比之下,尽管PmAldolase通常更有效,但PmAldolase和EcAldolase均可催化3-氟(a / e)-唾液酸及其C-9类似物的合成。化学合成的3-氟(a / e)-唾液酸类似物经过纯化和化学衍生,以形成所需的二氟唾液酸及其衍生物。对几种细菌唾液酸酶和重组人胞浆唾液酸酶hNEU2的抑制研究表明,唾液酸酶的抑制作用受C-3氟立体化学和抑制剂在C-5和/或C-9处的衍生作用的影响。与观察到的甲型流感病毒唾液酸酶和hNEU2相反,与3F赤道对应物相比,在C-3处具有轴向氟的化合物是更好的细菌唾液酸酶抑制剂(最多100倍)。C-5修饰的化合物