Novel 6-5 Fused Ring Heterocycle Antifolates with Potent Antitumor Activity: Bridge Modifications and Heterocyclic Benzoyl Isosters of 2,4-Diamino-6,7-dihydro-5H-cyclopenta(d)pyrimidine Antifolate.
作者:Yoshihiko KOTAKE、Tatsuo OKAUCHI、Atsumi IIJIMA、Kentaro YOSHIMATSU、Hiroaki NOMURA
DOI:10.1248/cpb.43.829
日期:——
tumor cell growth, N-[4-[3-(2,4-diamino-6,7-dihydro-5H-cyclopenta[d]pyrimidin-5- yl)propyl]benzoyl]-L-glutamic acid (1), have led to the synthesis of new cyclopenta[d]pyrimidine-based antifolates, including those with low alkyl substituted trimethylene bridges (2a, b) and isosterically modified bridges (ethyleneoxa, 2c; ethyleneamino, 2d; the N-methyl- and N-ethyl derivatives of 2d, 2e, f) and those
结构强大的二氢叶酸还原酶(DHFR)活性和肿瘤细胞生长抑制剂N- [4- [3-(2,4-diamino-6,7-dihydro-5H-cyclopenta [d] pyrimidin-5-] (1)导致了新的基于环戊达[d]嘧啶的抗叶酸的合成,包括具有低烷基取代的亚丙基桥键(2a,b)和等位修饰桥键的化合物(亚乙基氧; 2c;亚乙基氨基2d; 2d,2e,f)的N-甲基和N-乙基衍生物以及其中1的苯环已被杂环等排物取代的化合物(吲哚,2g;二氢吲哚,2h;噻吩, 2i)。这些新的类似物作为DHFR和细胞生长抑制剂非常有效,在暴露于72小时的药物后,它们比甲氨蝶呤(MTX)和10-乙基-10-去氮杂蝶呤(10-EDAM)更有效地抑制肿瘤细胞的生长(对P388 MTX敏感和对MTX耐药,结肠26和KB) 。其中2a(1的10-甲基衍生物)和2i最有效,其效力比10-EDAM高2至3倍。药物暴