Discovery of a potent anti-tumor agent through regioselective mono-N-acylation of 7H-pyrrolo[3,2-f]quinazoline-1,3-diamine
作者:Jingjin Chen、Alina Kassenbrock、Bingbing X. Li、Xiangshu Xiao
DOI:10.1039/c3md00134b
日期:——
7H-Pyrrolo[3,2-f]quinazoline-1,3-diamine (1) is a privileged chemical scaffold with significant biological activities. However, the currently accessible chemical space derived from 1 is rather limited. Here we expanded the chemical space related to 1 by developing efficient methods for regioselective monoacylation at N1, N3 and N7, respectively. With this novel methodology, a focused library of mono-N-acylated pyrroloquinazoline-1,3-diamines was prepared and screened for anti-breast cancer activity. The structure–activity relationship (SAR) results showed that N3-acylated compounds were in general more potent than N1-acylated compounds while N7-acylation significantly reduced their solubility. Among the compounds evaluated, 7f possessed 8-fold more potent activity than 1 in MDA-MB-468 cells. More importantly, 7f was not toxic to normal human cells. These results suggest that 7f is a novel compound as a potential anti-breast cancer agent without harming normal cells.
7H-吡咯并[3,2-f]喹唑啉-1,3-二胺(1)是一种具有显著生物活性的优势化学骨架。然而,目前可获得的源自1的化学空间相当有限。本文通过开发高效的方法,分别实现了对N1、N3和N7位点的区域选择性单酰化,从而扩展了与1相关的化学空间。利用这种新颖的方法,制备并筛选了一个针对乳腺癌活性的单N-酰化吡咯喹唑啉-1,3-二胺的聚焦库。结构-活性关系(SAR)结果显示,N3-酰化化合物通常比N1-酰化化合物更有效,而N7-酰化显著降低了化合物的溶解性。在评估的化合物中,7f在MDA-MB-468细胞中比1具有8倍的更强活性。更重要的是,7f对正常人类细胞无毒性。这些结果表明,7f是一种新型化合物,可能作为一种不损害正常细胞的潜在乳腺癌治疗药物。