[EN] 4'-HALOGEN CONTAINING NUCLEOTIDE AND NUCLEOSIDE THERAPEUTIC COMPOSITIONS AND USES RELATED THERETO [FR] COMPOSITIONS THÉRAPEUTIQUES À BASE DE NUCLÉOSIDES ET DE NUCLÉOTIDES CONTENANT DU 4'-HALOGÈNE ET UTILISATIONS ASSOCIÉES
[EN] 4'-HALOGEN CONTAINING NUCLEOTIDE AND NUCLEOSIDE THERAPEUTIC COMPOSITIONS AND USES RELATED THERETO [FR] COMPOSITIONS THÉRAPEUTIQUES À BASE DE NUCLÉOSIDES ET DE NUCLÉOTIDES CONTENANT DU 4-HALOGÈNE ET UTILISATIONS ASSOCIÉES
Stereoselective synthesis of 4'-alpha-carbon-substituted nucleosides has been accomplished through epoxidation of 4',5'-unsaturatednucleosides with dimethyldioxirane (DMDO) and successive SnCl(4)-promoted ring opening of the resulting 4',5'-epoxynucleosides with organosilicon reagents. [reaction: see text]