Design, Synthesis, and Molecular Modeling of Novel Pyrido[2,3-<i>d</i>]pyrimidine Analogues As Antifolates; Application of Buchwald–Hartwig Aminations of Heterocycles
作者:Aleem Gangjee、Ojas A. Namjoshi、Sudhir Raghavan、Sherry F. Queener、Roy L. Kisliuk、Vivian Cody
DOI:10.1021/jm400086g
日期:2013.6.13
(AIDS). The absence of any animal models for human Pneumocystis jirovecii pneumonia and the lack of crystal structures of pjDHFR and tgDHFR make the design of inhibitors challenging. A novel series of pyrido[2,3-d]pyrimidines as selective and potent DHFR inhibitors against these opportunistic infections are presented. Buchwald–Hartwig coupling reaction of substituted anilines with pivaloyl protected 2
由吉氏肺孢子菌(P. jirovecii , pj)、弓形虫(T. gondii , tg)和鸟分枝杆菌(M. avium , ma)引起的机会性感染是获得性免疫缺陷综合征(AIDS)患者发病和死亡的主要原因。 )。缺乏人类肺孢子菌肺炎的任何动物模型以及缺乏pj DHFR 和tg DHFR的晶体结构使得抑制剂的设计具有挑战性。吡啶并[2,3- d]的新系列]嘧啶作为选择性和有效的 DHFR 抑制剂来对抗这些机会性感染。取代苯胺与新戊酰基保护的 2,4-diamino-6-bromo-pyrido[2,3- d ]pyrimidine 的Buchwald-Hartwig 偶联反应被成功探索以合成这些类似物。化合物26是最具选择性的抑制剂,对pj DHFR具有优异的效力。使用pj DHFR 同源模型进行的分子建模研究解释了26的效力和选择性。结构数据还报告了26与PC DHFR和16以及22与变种PC