Facile and efficient access to Androsten-17-(1′,3′,4′)-pyrazoles and Androst-17β-(1′,3′,4′)-pyrazoles via Vilsmeier reagents, and their antiproliferative activity evaluation in vitro
作者:Jian Li、Haibo Huo、Rui Guo、Biao Liu、Longbo Li、Wenjia Dan、Xinmin Xiao、Jiwen Zhang、Baojun Shi
DOI:10.1016/j.ejmech.2017.02.033
日期:2017.4
steroidal pyrazole derivatives were designed and effectively synthesized with two different commercially available staring material, Isopregnanolone 1 and 5,16-Pregnadienolone 7, via the key intermediates, 17β-(4'-formyl)pyrazolylandrost-3β-yl formate and 17-(4'-formyl)pyrazolylandrost- 5,16-dienes-3β-yl formate, which were obtained from the cyclization of steroidal phenylhydrazone with Vilsmeier reagent
在这项工作中,设计了二十七种新型甾族吡唑衍生物,并通过关键中间体17β-(4'-甲酰基)吡唑基兰德罗斯特-3β与两种不同的市售凝视物质Isopregnanolone 1和5,16-Pregnadienolone 7进行了有效合成。甲酸酯和17-(4'-甲酰基)吡唑基丙二酸酯-5,16-二烯-3β-甲酸酯,它们是由三氯氧磷催化Vilsmeier试剂将甾体苯hydr环化,然后水解,然后进行Borch还原而制得的在温和条件下的目标衍生物。这些化合物的结构通过1 H NMR,13 C NMR和高分辨率质谱鉴定。根据我们之前的工作,通过SRB方法评估了这些衍生物对293T细胞系和三种癌细胞系A549,Hela和MCF-7。结果表明,化合物5b-d和11a-e表现出中等至高的细胞毒活性,IC50值为0.62至7.51μM。在这八种杂种中,具有乙基氨基和二烯妊娠部分的化合物11b显示出最高的效价,对于2