A detailed study of the regio-and stereoselective electrophilic functionalization of the C5-C6 double bond in the uracil and thymine series using the cohalogenation with various oxygen nucleophiles is described.
Oxidative Damage of Pyrimidine Nucleosides by the Environmental Free Radical Oxidant NO3• in the Absence and Presence of NO2• and Other Radical and Non-Radical Oxidants
作者:Catrin Goeschen、Jonathan M. White、Robert W. Gable、Uta Wille
DOI:10.1071/ch11446
日期:——
promotes conversion of the initially formed radical cation 7 to 4 in an autocatalytic fashion. When the reaction of NO2• with O3 was used to generate NO3•, the initially formed radical cation 7 in the reaction with permethylated uridine 1 is rapidly trapped by NO2• to give 5-nitrouridine 18 in a radical mediated vinylic substitutionreaction. In contrast to this, under similar conditions in the reaction involving