化合物的侧链在其生物学功能中起着重要作用。在我们的研究中,我们发现具有不同侧链和羟基氨基在环 A 和 B 上位置的羟基亚氨基类固醇衍生物对多种癌细胞类型显示出显着不同的细胞毒性。环 B 上的肟基团和环 A 或 B 上的羟基导致比其他结构基序更高的细胞毒性。此外,生物活性需要第 17 位的胆固醇型侧链。我们的研究结果提供了新的证据,表明化学结构与生物功能之间的关系。从研究中获得的信息可能有助于设计新型化疗药物。
A facile and efficient synthesis of some (6E)-hydroximino-4-en-3-one steroids, steroidal oximes from Cinachyrella spp. sponges
作者:Jianguo Cui、Liliang Huang、Lei Fan、Aimin Zhou
DOI:10.1016/j.steroids.2007.10.007
日期:2008.3
Using beta-sitosterol as a starting material, (6E)-hydroximino-24-ethylcholest-4-en-3-one (1), a natural steroidal oxime from Cinachyrella alloclada and C. apion, was synthesized in four steps with a high overall yield. First, beta-sitosterol (5a) is transformed into the corresponding 24-ethylcholest-4-en-3,6-dione (6a) via oxidation with pyridinium. chlorochromate (PCC). Selective reduction of 6a by NaBH4 in the presence of CoCl2 gives 24-ethylcholest-4-en-3 beta-ol-6-one (7a). The reaction of 7a with hydroxylamine hydrochloride offers the oxime 8a and the oxidation of 8a by Jones reagent gives the target steroid 1. (6E)-Hydroximinocholest-4-en-3-one (2) and (6E)-hydroximino-24-ethylcholest-4,22-dien-3-one (4) were synthesized by a similar method. The cytotoxicity of the synthesized compounds against sk-Hep-1 (human liver carcinoma cell line), H-292 (human lung carcinoma cell line), PC-3 (human prostate carcinoma cell line) and Hey-1B (human ovarian carcinoma cell line) cells were investigated. The presence of a cholesterol-type side chain appears to be necessary for the biological activity. (C) 2007 Elsevier Inc. All rights reserved.