Microwave-assisted construction of triazole-linked amino acid–glucoside conjugates as novel PTP1B inhibitors
作者:Xiao-Peng He、Cui Li、Xiao-Ping Jin、Zhuo Song、Hai-Lin Zhang、Cheng-Jiang Zhu、Qiang Shen、Wei Zhang、Li Sheng、Xiao-Xin Shi、Yun Tang、Jia Li、Guo-Rong Chen、Juan Xie
DOI:10.1039/c0nj00835d
日期:——
There has been increasing interest in the development of protein tyrosine phosphatase 1B (PTP1B) inhibitors for the treatment of type 2 diabetes, obesity and breast cancer. We report here the identification of a series of mono- and bis-phenylalaninyl and tyrosinyl glucoside derivatives as novel PTP1B inhibitors. The designed compounds bearing one or two phenylalanine or tyrosine derivatives on the 6-, 2,3-, 2,6-, 3,4- and 4,6-positions of the glucosyl scaffolds were efficiently constructed via the microwave-assisted Cu(I)-catalyzed azideâalkyne cycloaddition in moderate-to-excellent yields. Successive biological assays identified these compounds as novel PTP1B inhibitors, with the 4,6-disubstituted tyrosinyl glucoside being the most potent. A kinetic study established that both mono- and bis-triazole-linked glycosyl acids act as typical competitive inhibitors whereas the bis-triazolyl ester that also exhibited inhibitory activity on PTP1B displayed a mixed-type inhibition pattern. Furthermore, docking simulation plausibly proposed the diverse binding modes of these compounds with the enzymatic target.
人们对开发用于治疗 2 型糖尿病、肥胖症和乳腺癌的蛋白酪氨酸磷酸酶 1B (PTP1B) 抑制剂越来越感兴趣。我们在此报告了一系列单苯丙氨酸和双苯丙氨酸及酪氨酸葡萄糖苷衍生物作为新型 PTP1B 抑制剂的鉴定结果。通过微波辅助 Cu(I)催化的叠氮烷烃环加成法,我们高效地构建了在葡萄糖基支架的 6-、2,3-、2,6-、3,4- 和 4,6 位上含有一个或两个苯丙氨酸或酪氨酸衍生物的化合物,并获得了中等至优异的产率。通过连续的生物学测定,这些化合物被确定为新型 PTP1B 抑制剂,其中 4,6-二取代酪氨酰葡萄糖苷的抑制作用最强。动力学研究表明,单链和双链三唑糖基酸都是典型的竞争性抑制剂,而对 PTP1B 也有抑制活性的双链三唑酯则显示出混合型抑制模式。此外,对接模拟还合理地提出了这些化合物与酶靶的不同结合模式。