2,4-Diamino-5-benzylpyrimidines and analogs as antibacterial agents. 12. 1,2-Dihydroquinolylmethyl analogs with high activity and specificity for bacterial dihydrofolate reductase
作者:Jay V. Johnson、Barbara S. Rauckman、David P. Baccanari、Barbara Roth
DOI:10.1021/jm00128a042
日期:1989.8
Twelve 2,4-diamino-5-[(1,2-dihydro-6-quinolyl)methyl]pyrimidines containing gem-dimethyl or fluoromethyl substituents at the 2-position of the dihydroquinoline ring were prepared by condensations of dihydroquinolines with 2,4-diamino-5-(hydroxymethyl)pyrimidine. The dihydroquinolines were produced from the reaction of anilines with mesityl oxide or fluoroacetone. In some cases, 1-aryl-2,4-dimethylpyrroles
通过二氢喹啉与2,4的缩合反应制得十二个2,4-二氨基-5-[(1,2-二氢-6-喹啉基)甲基]嘧啶,在二氢喹啉环的2位上含有二甲基或氟甲基取代基。 -二氨基-5-(羟甲基)嘧啶。二氢喹啉是由苯胺与氧化异丁烯或氟丙酮反应制得的。在某些情况下,获得了1-芳基-2,4-二甲基吡咯作为副产物。这些嘧啶中的大多数对大肠杆菌二氢叶酸还原酶(DHFR)具有高度抑制作用,并且对细菌酶具有高度特异性。2,4-二氨基-5-[[[1,2-二氢-2,4-二甲基-3-氟-2-(氟甲基)-8-甲氧基-6(1H)喹啉基]甲基]嘧啶的表观Ki值大肠杆菌DHFR比对照甲氧苄啶(13)低13倍,对细菌酶的选择性高出1个数量级。它在体外对革兰氏阳性生物具有出色的活性,以及与1相当的广谱抗菌活性。体内测试的结果将在其他地方报道。二氢喹啉衍生物的宝石-二甲基取代基被认为负责高选择性,并有助于有效抑制细菌DHFR。提出了分子模