中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1-<5(S)-acetamido-5,6-dideoxy-6-(p-toluenesulfonyl)-β-D-ribo-hexofuranosyl>uracil | 138310-77-7 | C19H23N3O8S | 453.473 |
—— | 1-<5(S)-amino-5,6-dideoxy-2,3-O-isopropylidene-6-(p-toluenesulfonyl)-β-D-ribo-hexofuranosyl>uracil | 138310-73-3 | C20H25N3O7S | 451.5 |
—— | 1-<5(S)-acetamido-5,6-dideoxy-2,3-O-isopropylidene-6-(p-toluenesulfonyl)-β-D-ribo-hexofuranosyl>uracil | 138310-76-6 | C22H27N3O8S | 493.538 |
2’,3’邻异亚丙基尿苷 | 2',3'-O-isopropylideneuridine | 362-43-6 | C12H16N2O6 | 284.269 |
—— | (3aS,4S,6R,6aR)-6-(2,4-Dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxole-4-carbaldehyde | 27999-65-1 | C12H14N2O6 | 282.253 |
Treatment of 2′,3′-O-isopropylideneuridine-5′-aldehyde with the stabilized Wittig reagent, (p-toluenesulfonylmethylene)triphenylphosphorane, gave high yields of 1-[5,6-dideoxy-2,3-O-isopropylidene-6-(p-toluenesulfonyl)-β-D-ribo-hex-5(E)-enofuranosyl]uracil (2). This vinylsulfone (2) underwent isomerization readily in base to give the allylic sulfone, 1-[5,6-dideoxy-2,3-O-isopropylidene-6-(p-toluenesulfonyl)-β-D-erythro-hex-4(Z)-enofuranosyl]uracil (3). Treatment of 2 or 3 with aqueous trifluoroacetic acid gave the corresponding deprotected vinyl (5) or allylic (6) sulfones, and 5 was converted to 6 readily in basic solutions. Treatment of 2 with sodium borohydride, sodium thiomethoxide, or ammonia resulted in conjugate addition (at C5′ of the vinyl sulfone) to give the 5′-hydro, 5′-methylthio, or 5′-amino-5′,6′-dideoxy-6′-(p-toluenesulfonyl) nucleosides. The 5′-substituted diastereomers were deprotected, separated, and the configuration of a 5′-amino derivative was established by X-ray crystallography.Key words: allylic sulfones, amino-nucleosides, 5′,6′-dideoxynucleosides, nucleosides, uridine, vinyl sulfones.