Synthesis of some 5-halogenovinyl derivatives of uracil and their conversion into 2′-deoxyribonucleosides
作者:Philip J. Barr、A. Stanley Jones、Gabriel Verhelst、Richard T. Walker
DOI:10.1039/p19810001665
日期:——
gave (E)-5-(2-carboxyvinyl)uracil which, upon reaction with the appropriate N-halogenosuccinimide, gave (E)-5-(2-bromovinyl)uracil, (E)-5-(2-chlorovinyl)uracil, and (E)-5-(2-iodovinyl)uracil. The last mentioned compound was also obtained by the action of iodine chloride on 5-vinyluracil. 5-(1-Chlorovinyl)uracil upon treatment with bromine gave 5(2-bromo-1-chlorovinyl)uracil which reacted with sodium
在哌啶存在下用丙二酸处理5-甲酰尿嘧啶,得到(E)-5-(2-羧基乙烯基)尿嘧啶,与适当的N-卤代琥珀酰亚胺反应后,得到(E)-5-(2-溴乙烯基)尿嘧啶。 ,(E)-5-(2-氯乙烯基)尿嘧啶和(E)-5-(2-碘乙烯基)尿嘧啶。最后提到的化合物也是通过氯化碘对5-乙烯基尿嘧啶的作用而获得的。用溴处理5-(1-氯丙炔基)尿嘧啶得到5(2-溴-1-氯乙烯基)尿嘧啶,其与甲醇钠反应得到5-溴乙炔基尿嘧啶。(E)-5-(2-溴乙烯基)-尿嘧啶转化为三甲基甲硅烷基衍生物,与2-脱氧-3,5-二-O-(p(-甲苯甲酰基)-α- D-赤-五呋喃糖酰氯,得到被保护的脱氧核糖核苷的α-和β-异头物。用甲醇钠除去对甲苯甲酰基保护基,得到(E)-5-(2-溴乙烯基)-1-(2-脱氧-α- D-赤型-戊呋喃糖基)尿嘧啶和(E)-5-(2-溴夫酰基)-2'-脱氧尿苷。一系列类似的反应,得到(Ë)-5-(2-碘乙