New anticancer agents: alterations of the carbamate group of ethyl (5-amino-1,2-dihydro-3-phenylpyrido[3,4-b]pyrazin-7-yl)carbamates
作者:Carroll Temple、Gregory A. Rener、Robert N. Comber
DOI:10.1021/jm00130a023
日期:1989.10
of 8, by reductive cyclization of nitropyridine intermediates, and by hydride reduction of the ring of heteroaromatic compounds. In vitro and in vivo evaluations of analogues indicated that a carbamate group was required for activity. No significant change in activity was observed when ethyl was replaced by methyl. However, activity was reduced when ethyl was replaced with bulky aliphatic groups and
据报道,(1,2-二氢吡啶并[3,4-b]吡嗪-7-基)氨基甲酸乙酯与细胞微管蛋白结合,在有丝分裂时产生细胞积聚,并表现出对小鼠实验性肿瘤的细胞毒活性。对(5-氨基-1,2-二氢-2-甲基-3-苯基吡啶并[3,4-b]吡嗪-7-基)氨基甲酸乙酯的处置研究表明,一种代谢物是由氨基甲酸乙酯部分的裂解。氨基甲酸酯基团发生变化的类似物是通过在8的氨基甲酸酯上进行转化,硝基吡啶中间体的还原环化以及氢化还原杂芳族化合物的环而制得的。类似物的体外和体内评价表明,氨基甲酸酯基团是活性所必需的。当乙基被甲基取代时,没有观察到活性的显着变化。然而,当乙基被笨重的脂族基团取代和乙氧基被甲氨基基团取代时,活性降低。同样,通过5-氨基的乙酰化降低了8的活性,并且通过在8-位取代了氨基而破坏了8的活性。