Coupling of biologically active steroids to conjugating arms through ether linkages for use in immunochemistry
作者:Michel J. Kohl、Robert G. Lejeune
DOI:10.1016/s0039-128x(01)00134-9
日期:2002.1
completely formed by reaction of the steroid with thallium ethoxide and by the continuous elimination of ethanol. The halogenated chain was then introduced into the same medium and reacted in the absence of moisture to give the ether. 17beta-Hydroxy and 11alpha-hydroxy derivatives were involved in this reaction. The coupling was effective for all of the compounds tested after 2-36 h of reaction time and at
半抗原通过醚键的结合避免了免疫分析中的泄漏问题,但这种方法不容易应用于大多数带有低反应羟基的类固醇。提出了一种新技术,允许在与热敏保护基团相容的温和条件下将生物活性类固醇与共轭臂进行醚偶联。在第一步中,使用填充有 0.3 nm 和 0.4 nm 分子筛的筒在索格利特装置中通过共沸蒸馏将溶剂(芳烃)脱水。在这种受保护的介质中,通过类固醇与乙醇铊的反应和乙醇的连续消除,完全形成了铊类固醇醇盐。然后将卤化链引入相同的介质中并在没有水分的情况下反应得到醚。17β-羟基和11α-羟基衍生物参与了该反应。在 2-36 小时的反应时间和 80 到 140 摄氏度之间的温度下,偶联对所有测试的化合物都是有效的。偶联物的纯度至少为 95%,产率范围为 15% 到 95%。