2'-deoxy-5-trifluoromethyluridine derivatives represented by general formula (I), (wherein Tr represents a triphenylmethyl group and R represents a lower alkyl group or a benzyl group) and a process for their preparation. The derivatives are prepared by subjecting a 2'-deoxy-5 halogenuridine derivative represented by general formula (II), (wherein W represents an iodine atom or a bromine atom, Tr represents a triphenylmethyl group, and R represents a lower alkyl group or a benzyl group) to trifluoromethylation reaction with halogenotrifluoromethane in the presence of metallic copper.
通式(I)代表的2'-脱氧-
5-三氟甲基尿苷衍
生物(其中Tr代表三苯甲基,R代表低级烷基或苄基)及其制备方法。这些衍
生物的制备方法是将通式(II)代表的 2'-脱氧-5-卤
尿苷衍
生物(其中 W 代表
碘原子或
溴原子,Tr 代表三苯甲基,R 代表低级烷基或苄基)在
金属
铜存在下与卤代
三氟甲烷进行三
氟甲基化反应。