Js. Vyle et al., SYNTHESIS OF URIDINE ANALOGS TO PROBE THE FUNCTIONAL-GROUP REQUIREMENTS OF THE HAIRPIN RIBOZYME, Collection of Czechoslovak Chemical Communications, 61, 1996, pp. 280-282
O-4-Methyluridine, O-2-methyluridine and (4H)uridine phosphoramidites
were prepared with 2'-O-silyl protection, The methyl modified pyrimidi
nes were synthesised from uridine via the triazolide (O-4-methyl) or 2
,5'-cyclo derivative (O-2-methyl). An improved synthesis of protected
4-thiouridine was also performed.