Methyltrioxorhenium (MTO) is a useful and selective catalyst for the oxidation of uracil and purine derivatives using environmentally friendly hydrogenperoxide (H2O2, 30% water solution) or hydrogenperoxide/urea adduct (UHP) as oxygen atom donors. In particular, the MTO/UHP system constitutes a convenient combination to convert uracil derivatives into the biologically relevant 5,6-oxiranyl-5,6-dihydrouracils
甲基三(MTO)为尿嘧啶和嘌呤衍生物的使用环境友好的过氧化氢的氧化的有用的和选择性的催化剂(H 2 ö 2为氧原子供体,30%的水溶液)或过氧化氢/尿素加合(UHP)。尤其是,MTO / UHP系统构成了方便的组合,可以以高收率将尿嘧啶衍生物转化为生物学上相关的5,6-环氧乙烷基-5,6-二氢尿嘧啶。嘌呤衍生物被选择性氧化为相应的1-氧化物,在吡嗪-2-羧酸(PCA)存在下可获得最佳收率。也报道了质粒pBG1的氧化是由催化系统MTO / H 2 O 2介导的双链DNA切割的第一个实例。
Oxidation of uracil derivatives and pyrimidine nucleosides by dimethyldioxirane: A new and mild synthesis of 5,6-oxiranyl-5,6-dihydro and 5,6-dihydroxy-5,6-dihydro-derivatives.