Synthesis, computational studies and enzyme inhibitory kinetics of substituted methyl[2-(4-dimethylamino-benzylidene)-hydrazono)-4-oxo-thiazolidin-5-ylidene]acetates as mushroom tyrosinase inhibitors
作者:Pervaiz Ali Channar、Aamer Saeed、Fayaz Ali Larik、Muhammad Rafiq、Zaman Ashraf、Farukh Jabeen、Tanzeela Abdul Fattah
DOI:10.1016/j.bmc.2017.09.009
日期:2017.11
The present article describes the synthesis and enzyme inhibitory kinetics of methyl[2-(arylmethylene-hydrazono)-4-oxo-thiazolidin-5-ylidene]acetates 5a–j as mushroom tyrosinase inhibitors. The title compounds were synthesized via cyclocondensation of thiosemicarbazones 3a–j with dimethyl but-2-ynedioate (DMAD) 4 in good yields under solvent-free conditions. The synthesized compounds were evaluated
本文描述了作为蘑菇酪氨酸酶抑制剂的甲基[2-(芳基亚甲基-肼基)-4-氧代-噻唑烷-5--5-亚甲基]乙酸酯5a – j的合成和酶抑制动力学。标题化合物是在无溶剂条件下,以高收率通过硫代半咔唑3a – j与丁-2-炔二酸二甲酯(DMAD)4的环缩合反应合成的。评价合成的化合物抑制蘑菇酪氨酸酶活性的潜力。据透露,化合物5i在IC 50为3.17 µM时显示出优异的酶抑制活性,而IC 50为标准曲酸的浓度为15.91 µM。化合物5i中杂环吡啶环的存在在酶抑制活性中起重要作用,因为所有合成的化合物中其余的官能团都是常见的。通过Lineweaver-Burk图和Dixon图确定的最有效衍生物5i的酶抑制动力学表明,它是与Ki不竞争的抑制剂值1.5 µM。进一步研究表明,湿实验室的结果与计算结果非常吻合。对酪氨酸酶蛋白(PDBID 2Y9X)进行合成化合物的分子对接,以在分子水平上描述配体-蛋白相