When the aci-nitroester obtained from N3-methyl- or O2-methyluridine was allowed to react with acetylmethylenetriphenylphosphorane, 1-[(E)-5,6,8-trideoxy-β-d-ribo-oct-5-eno-1,4-furanosid-7-ulosyl]-3-methyl- or O2-methyl-uracil (12 or 14) was selectively obtained.
当从N3-甲基或O2-甲基
尿苷中获得的乙酰硝基酯与乙酰甲基
三苯基膦反应时,可选择性地得到1-[(E)-5,6,8-三脱氧-β-d-
核糖-8-烯-1,4-
呋喃糖苷-7-
尿苷酰]-3-甲基或O2-甲基尿
嘧啶(12或14)。