Structure−Activity Relationships for Pyrido-, Imidazo-, Pyrazolo-, Pyrazino-, and Pyrrolophenazinecarboxamides as Topoisomerase-Targeted Anticancer Agents
摘要:
Heterocyclic phenazinecarboxamides were prepared by condensation of aminoheterocycles and 2-halo-3-nitrobenzoic acids, followed by reductive ring closure and amidation. They showed similar inhibition of paired cell lines that underexpressed topo II or overexpressed P-glycoprotein, indicating a non topo II mechanism of cytotoxicity and indifference to P-glycoprotein mediated multidrug resistance. Compounds with a fused five-membered heterocyclic ring were generally less potent than the pyrido[4,3-alpha]phenazines. A 4-methoxypyrido[4,3-alpha]phenazine (IC(50)s 2.5-26 nM) gave modest (ca. 5 day) growth delays in H69/P xenografts with oral dosing.
DOI:
10.1021/jm010330+
作为产物:
描述:
2-碘-3-硝基-苯甲酸 、 4-氨基苯并咪唑 以above gave 2-(3H-benzimidazol-4-ylamino)-3-nitrobenzoic acid (25%, crude)的产率得到2-[1(3)H-benzimidazol-4-ylamino]-3-nitrobenzoic acid