Purine acyclic nucleosides. Unambiguous synthesis of acyclovir<i>via</i>a furazano[3,4-<i>d</i>]pyrimidine
作者:James L. Kelley、Howard J. Schaeffer
DOI:10.1002/jhet.5570230156
日期:1986.1
Acyclovir was synthesized in five steps from 7-formamido-5-methylthiofurazano[3,4-d]pyrimidine 2. Alkylation of 2 with 2-(benzoyloxy)ethoxymethyl chloride, followed by reductive cleavage of the furazan ring gave 9-[[2-(benzoyloxy)ethoxy]methyl]-2-(methylthio)adenine 5. Hydrolysis of the 6-amino group of 5, followed by amination of 7 with ammonia gave 9-[(2-hydroxyethoxy)methyl]guanine (1, acyclovir)
由5个步骤从7-甲酰胺基-5-甲硫基呋喃并[3,4- d ]嘧啶2合成了阿昔洛韦。2与2-(苯甲酰氧基)乙氧基甲基氯烷基化,然后还原裂解呋喃环得到9-[[[2-(苯甲酰氧基)乙氧基]甲基] -2-(甲硫基)腺嘌呤5。水解5的6-氨基,然后用氨将7胺化,得到9-[(2-羟基乙氧基)甲基]鸟嘌呤(1,阿昔洛韦)。