Nonclassical 2,4-Diamino-5-aryl-6-ethylpyrimidine Antifolates: Activity as Inhibitors of Dihydrofolate Reductase from <i>Pneumocystis carinii</i> and <i>Toxoplasma gondii</i> and as Antitumor Agents
作者:Claire Robson、Michelle A. Meek、Jan-Dierk Grunwaldt、Peter A. Lambert、Sherry F. Queener、Dirk Schmidt、Roger J. Griffin
DOI:10.1021/jm970055k
日期:1997.9.1
selectivity. Selected analogues were evaluated for in vivo antitumor activity against the methotrexate-resistant M5076 murine reticulosarcoma, with 2,4-diamino-5-4'-[N-[4"-(N"-methylcarbamoyl)benzyl]-N- methylamino]-3'-nitrophenyl}-6-ethylpyrimidine (14) (Ki for rat liver DHFR = 0.00035 +/- 0.00029 nM) combining significant antitumor activity with minimal toxicity.
在其上带有4-取代基的十二个新颖的2,4-二氨基-5-(4'-苄氨基)-和2,4-二氨基-5 [4'-(N-甲基苄基氨基)-3'-硝基苯基] -6-乙基对嘧啶合成了苄氨基或N-甲基苄氨基芳基环,并将其评价为卡氏肺孢子虫和弓形虫二氢叶酸还原酶(DHFR)的非经典抑制剂。通过2,4-二氨基-5-(4'-氯-3'-硝基苯基)-(8)或2,4-二氨基-5-(4'-氟-3'-硝基苯基)-的反应制备化合物6-乙基嘧啶(15),带有适当的4-取代的(CO2H,CO2Me,SO2NH2,二氧戊环-2-基,CHO,二甲基恶唑啉-2-基)苄胺或N-甲基苄胺衍生物。化合物25-29由2,4-二氨基-5- 4'-[N-(4“-羧基苄基)氨基] -3'-硝基苯基} -6-乙基嘧啶(10)和相应的胺(NH3, MeNH2,Me2NH,哌啶,L-谷氨酸二乙酯)通过异丁基混合酸酐偶联; L-谷氨酸二乙酯29水解后得到L