Design, Synthesis, and Antifolate Activity of New Analogues of Piritrexim and Other Diaminopyrimidine Dihydrofolate Reductase Inhibitors with ω-Carboxyalkoxy or ω-Carboxy-1-alkynyl Substitution in the Side Chain
作者:David C. M. Chan、Hongning Fu、Ronald A. Forsch、Sherry F. Queener、Andre Rosowsky
DOI:10.1021/jm0581718
日期:2005.6.1
nM), whereas the most selective was the 2'-(5-carboxy-1-pentynyl) analogue 21, with SI values of >100 against both P. carinii and M. avium DHFR relative to rat DHFR. The final compound, 2,4-diamino-5-[3'-(4-carboxy-1-butynyl)-4'-bromo-5'-methoxybenzyl]pyrimidine (22), was both potent and selective against M. avium DHFR (IC(50) = 0.47 nM, SI = 1300) but was not potent or selective against either P. carinii
在寻找二氢叶酸还原酶(DHFR)抑制剂的过程中,结合使用了吡非特辛(PTX)的高效力和甲氧苄啶(TMP)的抗寄生虫对哺乳动物的高选择性,迄今未描述的2,4-二氨基-6-(2',5合成了在苄基部分上具有O-(ω-羧基烷基)或ω-羧基-1-炔基的'-二取代苄基)吡啶基[2,3-d]嘧啶6-14,并测试了卡氏肺孢子虫,弓形虫和鸟分枝杆菌DHFR与大鼠DHFR。还合成并测试了三个N-(2,4-二氨基蝶呤-6-基)甲基)-2'-(ω-羧基-1-炔基)二苯并[b,f]氮杂环庚烷(19-21)。效能和选择性最佳组合的吡啶并嘧啶为2,4-二氨基-5-甲基-6- [2'-(5-羧基-1-丁炔基)-5'-甲氧基]苄基]嘧啶(13), IC对P的IC(50)值为0.65 nM。卡林氏DHFR,抗鸟分枝杆菌DHFR为0.57 nM,抗大鼠DHFR为55 nM。13对卡氏疟原虫DHFR的效力是PTX的20倍(IC(50)=