Computational design, synthesis and biological evaluation of PDE5 inhibitors based on N2,N4-diaminoquinazoline and N2,N6-diaminopurine scaffolds
作者:Thanachon Somnarin、Nattakarn Pobsuk、Ruttanaporn Chantakul、Teerapap Panklai、Prapapan Temkitthawon、Supa Hannongbua、Krongkarn Chootip、Kornkanok Ingkaninan、Kanokthip Boonyarattanakalin、Duangkamol Gleeson、M. Paul Gleeson
DOI:10.1016/j.bmc.2022.117092
日期:2022.12
We report the synthesis, and characterization of twenty-nine new inhibitors of PDE5. Structure-based design was employed to modify to our previously reported 2,4-diaminoquinazoline series. Modification include scaffold hopping to 2,6-diaminopurine core as well as incorporation of ionizable groups to improve both activity and solubility. The prospective binding mode of the compounds was determined using
我们报告了 29 种新的 PDE5 抑制剂的合成和表征。采用基于结构的设计来修改我们之前报道的 2,4-二氨基喹唑啉系列。修饰包括支架跳跃到 2,6-二氨基嘌呤核心以及掺入可电离基团以提高活性和溶解度。化合物的预期结合模式是使用基于 3D 配体的相似性方法与已知结合模式的抑制剂结合 PDE5 对接和基于分子动力学的协议来确定的,每个协议都指向相同的绑定模式。然后设计化学修饰以增加效力和溶解度以及验证结合模式预测。含有喹唑啉核心的化合物显示 IC 50s 范围从 0.10 到 9.39 µM,而那些由嘌呤支架组成的范围从 0.29 到 43.16 µM。我们鉴定出25种 PDE5 IC 50为 0.15 µM,并且溶解度 (1.77 mg/mL) 比起始先导化合物大大提高。此外,发现预测的结合模式与观察到的 SAR 一致,验证了我们的计算驱动方法。