Synthesis of 5-(1-substituted ethyl)uracil derivatives and some of their chemical and biological properties
作者:A. Stanley Jones、Michael J. McClean、Martin J. Slater、Richard T. Walker、Jan Balzarini、Erik De Clercq
DOI:10.1039/p19870000457
日期:——
series of 5-(1-substituted ethyl)uracil derivatives has been made. Attempts to obtain 5-(1-alkyl- or -aryl-sulphonyloxy) derivatives were unsuccessful because elimination to give the 5-vinyl derivatives was extremely easy. 5-(1-Acyloxyethyl) derivatives did not eliminate, but with aqueous alkali gave 5-(1-hydroxyethyl)uracil derivatives. Reaction of VdUrd with a series of arenethiols gave 5-(1-arylt
为了获得在碱性条件下通过消除将得到2'-脱氧-5-乙烯基尿苷(VdUrd)的化合物,制备了一系列5-(1-取代的乙基)尿嘧啶衍生物。尝试获得5-(1-烷基-或-芳基-磺酰氧基)衍生物是不成功的,因为消除以得到5-乙烯基衍生物是非常容易的。5-(1-羟乙基)衍生物没有消除,但是在碱水溶液中得到了5-(1-羟乙基)尿嘧啶衍生物。VdUrd与一系列芳烃硫醇的反应得到5-(1-芳硫基乙基)-2'-脱氧尿苷。在不存在自由基抑制剂的情况下,主要是5-(2-芳硫基乙基)-2'脱氧尿苷。芳硫基化合物被氧化成相应的亚砜和砜。用叔丁醇钾在二甲基甲酰胺中处理这些5-(1-取代的)衍生物,得到VdUrd。如预期的那样,具有最高离去基团的化合物的反应速率最大。然而,在碱水溶液下,化合物产生2'-脱氧-5-(1-羟乙基)尿苷,并且在37℃下在pH 7.6下它们是稳定的。当尿嘧啶环的N-3被烷基化时,消除更快。讨论了该