Structural Studies on Bioactive Compounds. 23. Synthesis of Polyhydroxylated 2-Phenylbenzothiazoles and a Comparison of their Cytotoxicities and Pharmacological Properties with Genistein and Quercetin
作者:Malcolm F. G. Stevens、Carol J. McCall、Peter Lelievald、Peter Alexander、Audrey Richter、Donna E. Davies
DOI:10.1021/jm00037a020
日期:1994.5
receptor tyrosine kinase or the PDGF receptor tyrosine kinase in a standard mitogenesis assay utilizing human fibroblasts, no discrimination was observed. In this assay, the compounds inhibited DNA synthesis when added to cells during S phase. This suggests that inhibition could not be interpreted in terms of tyrosine kinase inactivation but more likely as a relatively broad specificity for the ATP-binding
通过前体甲氧基化的2-苯基苯并噻唑9的去甲基化制备了一系列的多羟基化的2-苯基苯并噻唑3。构建苯并噻唑核的关键步骤涉及甲氧基化的硫代苯并甲腈8的雅各布森环化。目标化合物抑制WiDr人结肠肿瘤细胞和MCF-7人乳腺肿瘤细胞在体外的IC50值都在低微摩尔范围内,但对MCF-7细胞的活性与雌激素受体结合亲和力无关。与亲本3T3系相比,没有一种化合物对用pp120gag-abl酪氨酸激酶编码的经Abelson病毒转化的ANN-1细胞表现出选择性的细胞毒性。化合物对A431细胞膜制剂中的EGF受体相关蛋白酪氨酸激酶的抑制作用很小。活性最高的化合物是4,6-二羟基-2-(4-羟基苯基)苯并噻唑(3b),其整体羟基取代方式与染料木黄酮(1a)相同。这些化合物对EGF受体的细胞毒性较弱,过度表达细胞系HN5,但在使用人成纤维细胞的标准有丝分裂试验中测试了针对EGF受体酪氨酸激酶或PDGF受体酪氨酸激酶的差