A convenient preparation of α- and β-anomers of 1,5-di-O-benzoyl-2, 3-dideoxy-3-fluoro-D-erythro-pentofuranose is described. Each anomer is studied as the glycosylating agent in the reaction with bis-trimethylsilylated thymine in the presence of trimethylsilyl triflate. Under optimum conditions, 2′,3′-dideoxy-3′-fluorothymidine (FLT) and its α-anomer are isolated in 64 and 25% yields, respectively.
描述了一种方便的制备1,5-二-O-苯甲酰基-2,3-去氧-3-
氟-D-赤糖戊
呋喃糖的α-和β-异构体的方法。每种异构体作为糖苷化试剂,与双三甲基
硅基化胸腺
嘧啶在三甲基
硅基
三氟甲磺酸的存在下进行反应。 在最佳条件下,2′,3′-去氧-3′-
氟胸
腺苷(FLT)及其α-异构体的产率分别为64%和25%。