A re-examination of the difluoromethylenesulfonic acid group as a phosphotyrosine mimic for PTP1B inhibition
作者:Munawar Hussain、Vanessa Ahmed、Bryan Hill、Zaheer Ahmed、Scott D. Taylor
DOI:10.1016/j.bmc.2008.05.062
日期:2008.7
examined as PTP1B inhibitors. Replacing the distal sulfonamide moiety with a difluoromethylenesulfonamide group had only a modest effect on inhibitor potency. However, compound 6 was approximately a 1000-fold poorer inhibitor than compound 2. Most significantly, inhibition studies with compound 7 and a peptide bearing sulfonomethylphenylalanine revealed that the fluorines have little effect on the potency
蛋白酪氨酸磷酸酶1B(PTP1B)参与胰岛素信号的下调,并且是公认的糖尿病和肥胖症治疗靶标。设计有效PTP1B抑制剂的关键是有效模拟天然磷酸酪氨酸底物磷酸基团的部分。二氟甲基磺酰基甲基苯丙氨酸(F(2)Smp)是迄今为止报道的最好的单阴离子pTyr模拟物之一。然而,尚未在非肽基平台的背景下仔细评估作为磷酸盐模拟物的二氟亚甲基磺酸(DFMS)基团。在这里,我们对DFMS组作为磷酸盐模拟物进行了仔细的检查。这是通过首先构建先前报道的高亲和力,非肽基PTP1B抑制剂(化合物2,IC(50)= 8nM),其中二氟亚甲基膦酸基团被DFMS部分(化合物6)取代。我们还报告了其非氟化亚甲基磺酸类似物(化合物7)以及两个其他衍生物的合成,其中,远端磺酰胺部分被二氟亚甲基磺酰胺基团取代(化合物8和9)。研究了化合物2和6-9作为PTP1B抑制剂。用二氟亚甲基磺酰胺基团代替远端的磺酰胺基团对抑制剂的效力只有中