Synthesis of O2'-Methyluridine, O2'-Methylcytidine, N4,O2'-Dimethylcytidine and N4,N4,O2'-Trimethylcytidine from a Common Intermediate.

Abstract
A facile synthesis of the title compounds from a readily accessible precursor, 3'',5''-O-bis-protected O4-(2-nitrophenyl)uridine, is described.