Pyrazine nucleoside analogs. Synthesis and reactions of some 5-thio-substituted pyrazines
作者:Pittaya Tuntiwachwuttikul、Thomas J. Bardos、Miroslav Bobek
DOI:10.1002/jhet.5570280450
日期:1991.6
treatment with sodium thiobenzylate and diazotization. Condensation of the silyl derivative of 8 with a protected 2-deoxyribofuranosyl chloride gave α and β anomers of 5-benzylthiopyrazine nucleosides. Reaction of 2,5-dichloropyrazine 4-oxide with sodium thiobenzylate followed by hydrolysis gave 5-benzylthio-1,2-dihydro-2-oxopyrazine 4-oxide (16).
由2-氨基-5-溴吡嗪通过依次用硫代苄基钠处理和重氮化制备5-苄硫基-1,2-二氢-2-氧吡嗪(8)。8的甲硅烷基衍生物与保护的2-脱氧核糖呋喃糖基氯的缩合得到5-苄基硫吡嗪核苷的α和β端基异构体。2,5-二氯吡嗪4-氧化物与硫代苄酸钠反应,然后水解,得到5-苄硫基-1,2-二氢-2-氧吡嗪4-氧化物(16)。