Immunomodulatory and Anticancer Activities of Some Novel 2-Substituted-6-bromo-3-methylthiazolo[3,2-<i>a</i>]benzimidazole Derivatives
作者:Hatem A. Abdel-Aziz、Amira M. Gamal-Eldeen、Nehal A. Hamdy、Issa M. I. Fakhr
DOI:10.1002/ardp.200800189
日期:2009.4
cyanoacetate (7b) in refluxing ethanol afforded pyrazole derivatives 9a and 9b, respectively. Taken together, from the biological investigations compounds 9a and 9b were the most significant inhibitors of LPS‐stimulated NO generation from Raw murine macrophage 264.7, and, as another result, compounds 2 and 4 had a weak radical scavenging activity against DPPH radicals. Moreover, 2, 4, and 9a had a concomitant
6-溴-3-甲基-1,3-噻唑并[3,2-a]苯并咪唑-2-羧酸乙酯2是通过3-甲基-1,3-噻唑并[3,2- a]苯并咪唑-2-羧酸酯 1. 酰肼 4 是由酯 2 与水合肼反应得到的。用苯甲醛或2-噻吩醛处理化合物4分别产生相应的腙6a和6b,而酰肼4与乙氧基亚甲基丙二腈(7a)或乙氧基亚甲基氰基乙酸乙酯(7b)在回流乙醇中反应得到吡唑衍生物9a和9b , 分别。总之,从生物学研究中,化合物 9a 和 9b 是 LPS 刺激的原始鼠巨噬细胞 264.7 生成 NO 的最重要抑制剂,并且作为另一个结果,化合物2和4对DPPH自由基具有弱的自由基清除活性。此外,2、4 和 9a 对结肠癌细胞 (HCT-116) 和肝细胞癌细胞 (Hep-G2) 具有伴随的强细胞毒性,而 9b 仅对结肠癌细胞显示出特异性细胞毒性。