Process for preparing 5-perfluoroalkyl-5,6-dihydrouracil derivatives and compounds for use therein
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP0103436A2
公开(公告)日:1984-03-21
A process for preparing a 5-perfluoroalkyldihydrouracil derivative of the general formula
wherein Rf represents a perfluoroalkyl group, each of R1 and R2 represents a hydrogen atom, or an alkyl, cyloalkyl, aryl, aralkyl or heterocyclic group, and Y is an oxygen or sulfur atom, which comprises (a) reacting a compound of the general formula
wherein X represents a halogen atom or a hydroxyl group, with a urea derivative of the general formula
provided that when X is a hydroxyl group and at least one of R1 and R2 is a hydrogen atom, said reaction is carried out in the presence of a consensing agent, or (b) cyclizing a compound of the general formula
and a novel intermediate compound of the above formula (IV).
一种通式为 5-全氟烷基二氢尿嘧啶衍生物的制备方法
其中 Rf 代表全氟烷基,R1 和 R2 各代表氢原子或烷基、环烷基、芳基、芳烷基或杂环基,Y 是氧原子或硫原子,该工艺包括 (a) 使通式化合物与通式脲衍生物反应
其中 X 代表卤素原子或羟基,与通式的脲衍生物反应
条件是当 X 为羟基且 R1 和 R2 中至少有一个为氢原子时,上述反应在有调和剂存在的情况下进行,或 (b) 使通式化合物环化
和上式(IV)的新型中间体化合物环化。