Pin1 (Protein interacting with NIMA1) is a cis–trans isomerase and promotes the amide bond rotation of phosphoSer/Thr-Pro motifs in its substrates. Inhibition of Pin1 might be a novel strategy for developing anticancer agents. Herein, a series of pyrimidine derivatives were synthesized and their Pin1 inhibitory activities were evaluated. Among them, four compounds (2a, 2f, 2h and 2l) displayed potent inhibitory activities against Pin1 with IC₅₀ values lower than 3 µM. This series of pyrimidine-based inhibitors presented time-dependent inhibition against Pin1. The structure–activity relationships on the 2-, 4- and 5-positions of the pyrimidine ring were analyzed in details, which would facilitate further exploration of new Pin1 inhibitors.

Pin1（蛋白质与NIMA1相互作用）是一种顺式-反式异构酶，可促进其底物中phosphoSer / Thr-Pro基序的酰胺键旋转。抑制Pin1可能是开发抗癌药物的新策略。在此，合成了一系列嘧啶衍生物，并评价了它们的Pin1抑制活性。其中，四种化合物（2A，2F，2H和2升）显示强的抑制活性对中Pin1带IC ₅₀值低于3 µM。这一系列基于嘧啶的抑制剂对Pin1具有时间依赖性抑制作用。详细分析了嘧啶环2、4和5位上的结构活性关系，这将有助于进一步探索新的Pin1抑制剂。