申请人:Takeda Chemical Industries, Ltd.
公开号:EP0204264A2
公开(公告)日:1986-12-10
A process is disclosed for producing a 4-0-sulfonyluracil derivative of the formula
[wherein R1 is hydrogen, halogen, alkyl and alkoxy, R2 is glycosyl having protected hydroxyls; and -SO2R3 is an organic sulfonyl] which comprises reacting an uracil derivative of the formula
[wherein R1 and R2 are the same above] with an organic sulfonylating agent of the formula R2 S02X [wherein R3S02 is an organic sulfonyl and X is halogen] in the presence of potassium carbonate. The obtained 4-0-sulfonyluracil is further subjected to amination. The processes are industrially advantageous and produce cytosine derivatives such as cytidine in high yield.
本发明公开了一种生产 4-0 磺酰基尿嘧啶衍生物的工艺,其式为
其中 R1 是氢、卤素、烷基和烷氧基,R2 是具有受保护羟基的糖基;和 -SO2R3 是有机磺酰基],该工艺包括使式 R2 S02X 的有机磺酰化剂与式 R2 S02X 的尿嘧啶衍生物反应[其中 R1 和 R2 同上]。
[其中 R1 和 R2 同上]与式 R2 S02X [其中 R3S02 为有机磺酰基,X 为卤素]的有机磺化剂在碳酸钾存在下反应。得到的 4-0 磺酰基尿嘧啶再进行胺化处理。这些工艺具有工业优势,可以高产率生产胞嘧啶等胞嘧啶衍生物。