The present invention relates to a novel process for producing pyrimidine nucleosides by a reaction between bis(tri-lower alkylstannyl)-5-halogenouracil and 2-substituted tetrahydrofurane. The novel process of the present invention makes it possible to obtain, depending upon the manner of substitution of tetrahydrofurane residue on two nitrogen atoms N.sub.1 and N.sub.3 of 5-halogenouracil, N.sub.1 -mono-substituted compound, N.sub.3 -mono-substituted compound and N.sub.1,N-di-substituted compound among which the last can be converted by hydrolysis thereof into N.sub.1 -mono-substituted compound. The present invention further relates to novel N.sub.3 -mono-substituted compounds and N.sub.1,N.sub.3 -di-substituted compounds obtained by such process. The present invention still further relates to novel bis-(tri-lower alkylstannyl)-5-halogenouracil used in the present invention as a raw compound.
本发明涉及一种新型的
嘧啶核苷生产工艺,通过双(三低烷基基)-5-卤代尿
嘧啶和2-取代
四氢呋喃之间的反应来实现。本发明的新型工艺可以根据
四氢呋喃残基在5-卤代尿
嘧啶的两个氮原子N.sub.1和N.sub.3上的取代方式,获得N.sub.1-单取代化合物、N.sub.3-单取代化合物和N.sub.1,N-双取代化合物,其中最后一种可以通过
水解转化为N.sub.1-单取代化合物。本发明还涉及通过这种工艺获得的新型N.sub.3-单取代化合物和N.sub.1,N.sub.3-双取代化合物。本发明还涉及在本发明中作为原料化合物使用的新型双(三低烷基基)-5-卤代尿
嘧啶。