Conformationally restricted tricyclic analogues of lipophilic pyrido[2,3-<i>d</i>]pyrimidine antifolates
作者:Aleem Gangjee、Farahnaz Mavandadi、Sherry F. Queener
DOI:10.1002/jhet.5570380132
日期:2001.1
restriction of the C9-N10 bridge on inhibitory potency and selectivity of trimetrexate against dihydrofolate reductase, was studied. Specifically three nonclassical tricyclic 1,3-diamino-8-(3′,4′,5′-trimethoxybenzyl)-7,9-dihydro-pyrrolo[3,4-c]pyrido[2,3-d]pyrimidin-6(5H,8H)-one (4), 1,3-diamino-8-(3′,4′,5′-trimethoxybenzyl)-9-hydro-pyrrolo[3,4-c]pyrido[2,3-d]pyrimidin-6-(8H)-one (5) and 1,3-diamino-(8H)-(3′
研究了C9-N10桥的构象限制对曲美酯抗二氢叶酸还原酶的抑制能力和选择性的影响。具体地,三个非经典三环的1,3-二氨基-8-(3',4',5'-三甲氧基苄基)-7,9-二氢-吡咯并[3,4- c ]吡啶基[2,3 - d ]嘧啶-6 (5 H,8 H)-一(4),1,3-二氨基-8-(3',4',5'-三甲氧基苄基)-9-氢-吡咯并[3,4-c]吡啶[2, 3- d ]嘧啶-6-(8 ħ) -酮(5)和1,3-二氨基- (8H) - (3',4',5'-三甲氧基苄基)-7,9-二氢吡咯并[3,2 ,4- c ]吡啶基[2,3- d ]嘧啶(7合成了抗叶酸剂。三环类似物4和5是通过β-酮酯17与2,4,6-三氨基嘧啶的区域特异性环缩合获得的。通过在四氢呋喃中用硼烷还原内酰胺4获得类似物7。评价化合物4、5和7作为来自卡氏肺孢子虫,弓形虫和大鼠肝脏的二氢叶酸还原酶的抑制剂。所有这三种化合物对卡