Design, synthesis and enzymatic evaluation of 3- O -substituted aryl β- d -galactopyranosides as inhibitors of Trypanosoma cruzi trans -sialidase
作者:Bruno L. Silva、José D. S. Filho、Peterson Andrade、Ivone Carvalho、Ricardo J. Alves
DOI:10.1016/j.bmcl.2014.07.088
日期:2014.9
strategies of molecular modification. Ten new aryl galactosides modified at carbon-3 were synthesized employing classical carbohydrate chemistry and dibutyltin oxide method for regioselective 3-O-alkylations and evaluated against TcTS by spectrofluorimetry. The 4-methoxycarbonyl-2-nitrophenyl 3-O-carboxymethyl-β-d-galactopyranoside was the most active compound inhibiting 21% of TcTS enzymatic activity at 1 mM
克氏锥虫(TcTS)的反唾液酸酶是一种表面酶,可修饰唾液酸覆盖的寄生虫糖萼。这个过程对于人类宿主原生动物生命周期中的粘附和侵袭机制至关重要,这使得TcTS成为药物设计中非常有吸引力的分子靶标。以TcTS底物3'-唾液乳糖为原型,使用分子修饰策略设计了d-半乳糖衍生的TcTS潜在抑制剂。使用经典的碳水化合物化学和二丁基氧化锡方法合成了十个在碳3上修饰的新的芳基半乳糖苷,用于区域选择性3-O-烷基化,并通过光谱荧光法对TcTS进行了评估。4-甲氧羰基-2-硝基苯基3- O-羧甲基-β - d-吡喃半乳糖苷是活性最高的化合物,在1 mM时抑制21%的TcTS酶活性。