A series of novel acyclic nucleosides. II. Synthesis of acyclic nucleosides bearing an imidazo[4,5-<i>d</i>] [1,3]oxazine ring
作者:Hiroatsu Matsumoto、Chisato Kaneko、Takeo Mori、Yoshihisa Mizuno
DOI:10.1002/jhet.5570270525
日期:1990.7
Novel acyclic nucleosides 3a,b,c where N-1 of acyclovir is replaced by oxygen atom were prepared. Thus, 1-[(2-acetoxyethoxy)methyl]-5-amino-4-ethoxycarbonylimidazole (9) was treated with ethoxycarbonyl isothiocyanate or benzoyl isothiocyanate to give 11e,f. Methylation of the latter with methyl iodide afforded S-methylisothiourea derivative 12f which was treated with alkali and subsequently the mixture
制备了新的无环核苷3a,b,c,其中无环鸟苷的N-1被氧原子取代。因此,用乙氧基羰基异硫氰酸酯或苯甲酰基异硫氰酸酯处理1-[((2-乙酰氧基乙氧基)甲基] -5-氨基-4-乙氧基羰基咪唑(9),得到11e,f。后者用碘甲烷甲基化,得到S-甲基异硫脲衍生物12f,将其用碱处理,然后将混合物中和,得到5-氨基-3-[(2-羟基乙氧基)甲基] -3 H-咪唑并[4,5-]。d ] [1,3]恶嗪-7-一(3a)。化合物3b,c[(2-羟基乙氧基)甲基]咪唑-4-羧酸甲酯( -被处理乙酸酐或丙酸酐与钠5-氨基1中得到7将其制得)通过5-氨基- [(2-乙酰氧基乙氧基)甲基] -咪唑-4-羧酰胺(5)。对无环氧嘧啶类似物的细胞毒性和针对1型单纯疱疹病毒(HSV-1)的活性的评估表明,所测试的所有衍生物均无活性,但与阿昔洛韦相比,其细胞毒性相似或更低。