Synthetic intermediate of 1-(2-deoxy-2-fluoro-4-thio-β-D-arabinofuranosyl)cytosine
A compound represented by the formula [1F]:
wherein R1 represents a hydrogen atom or a hydroxyl protecting group; R2 represents a hydrogen atom or a hydroxyl-protecting group; R3C represents a hydrogen atom, a halogen atom, an optionally substituted alkyl group or -OR3a corresponding to a hydroxyl-protecting group; R3D represents a hydrogen atom, a halogen atom, an optionally substituted alkyl group or -OR3a corresponding to a hydroxyl-protecting group; R4 represents a halogen atom, a hydroxyl group, an optionally substituted alkylsulfonyloxy group or an optionally substituted arylsulfonyloxy group; R5 and R6 together represent =O or =NOR7 wherein R7 represents a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, an optionally substituted heterocyclic group or an optionally substituted silyl group; or R4 and R5 together represent a sulfur atom; and R6 represents a hydroxyl group. The compound is useful as an intermediate for producing a thionucleoside.
1-(2-
脱氧-2-
氟-4-
硫代-β-D-阿拉伯
呋喃糖基)
胞嘧啶的合成
中间体
由式[1F]表示的化合物:
其中 R1 代表
氢原子或羟基保护基团; R2 代表
氢原子或羟基保护基团; R3C 代表
氢原子、卤素原子、任选取代的烷基或与羟基保护基团相对应的-OR3a; R3D 代表
氢原子、卤素原子、任选取代的烷基或与羟基保护基团相对应的-OR3a;R4 代表卤原子、羟基、任选取代的烷基磺酰
氧基或任选取代的芳基磺酰
氧基;R5 和 R6 共同代表 =O 或 =NOR7 其中 R7 代表
氢原子、任选取代的烷基、任选取代的芳基、任选取代的杂环基或任选取代的
硅基;或 R4 和 R5 共同代表
硫原子;R6 代表羟基。该化合物可用作生产
硫代核苷的
中间体。