diffraction. The synthesized compounds were tested for their in‐vitro antitumor activity against the colon cancer cell line CaCo‐2; their cytotoxicity against the normal fibroblast cell line BHK was explored as well. Some of the tested compounds exhibited cell growth inhibitory activity. The significant antitumor activity of compound 14f against the CaCo‐2 cell line (IC50 = 0.5 μg/mL) was coupled with
                                    关键前体 E-3-(N,N-
二甲氨基)-1-(3-methylthiazolo[3,2-a]benzimidazol-2-yl)prop-2-en-1-one 4 以良好的收率合成黄
金试剂。在
硫酸存在下,烯胺酮 4 与 5-
氨基-3-芳基-
1-苯基吡唑 5a、b 在回流
乙酸中反应,生成
吡唑并 [3,4-b] 
吡啶 7a、b。类似地,
吡唑并[1,5-a]
嘧啶10a、b和14a-f分别通过烯胺酮4与5-
氨基-1H-
吡唑8a、b和12a-f反应制备。通过X射线衍射确定了
吡唑并[1,5-a]
嘧啶10b的结构。测试合成的化合物对结肠癌
细胞系 CaCo-2 的体外抗肿瘤活性;还探讨了它们对正常成纤维
细胞系 BHK 的细胞毒性。一些测试化合物表现出细胞生长抑制活性。