Synthesis of novel 17-(4′-formyl)pyrazolylandrosta-5,16-dienes and their derivatives as potent 17α-hydroxylase/C17,20-lyase inhibitors or antiproliferative agents depending on the substitution pattern of the heteroring
作者:Dóra Kovács、János Wölfling、Nikoletta Szabó、Mihály Szécsi、Zsuzsanna Schelz、István Zupkó、Éva Frank
DOI:10.1016/j.ejmech.2016.05.006
日期:2016.9
growth-inhibitory effects on some or all these cell lines than those of the reference cisplatin. With regard to the well-known structural features that a potent C17,20-lyase inhibitor should possess, some relevant derivatives were tested in vitro from the aspects of their inhibitory effects on rat testicular enzyme, and one of them proved to exert noteworthy enzyme-inhibitory action, with an IC50 (26 nM)
通过用Vilsmeier-Haack试剂处理最初形成的的环化/甲酰化序列,由乙酸泼尼地龙与单取代肼分两步有效地合成了一系列新颖的17-(4'-甲酰基)吡唑基兰德罗斯塔-5,16-二烯。通过脱乙酰基反应和随后的还原反应进一步转化产物,以扩大可用于药理研究的化合物库。此外,使在杂环-N上含有H或Me的4'-甲酰基吡唑经历肟形成和Ac 2 O诱导的脱水,以高收率提供相应的4'-氰基衍生物。测试了与结构相关的甾体17- exo-吡唑衍生物的抗增殖活性体外在四种人类贴壁乳腺癌细胞系(MCF7,T47D,MDA-MB-231和MDA-MB-361)上进行的研究:微培养四唑鎓分析显示,七种化合物对某些或所有这些细胞系均具有更好的细胞生长抑制作用比参考顺铂的那些。关于有效的C 17,20-裂合酶抑制剂应具有的众所周知的结构特征,从其对大鼠睾丸酶的抑制作用方面对一些相关的衍生物进行了体外测试,其中一种被证明发挥了重要的酶作用。