Synthesis of 2′,3′-Dideoxy-D-<i>erythro</i>-hexofuranosyl Nucleosides and 3′-Azido-2′, 3′-dideoxy-D-<i>arabino</i>-hexofuranosyl Nucleosides From Tri-<i>O</i>-acetyl-D-glucal via an α,β-Unsaturated Hexose Aldehyde
作者:Jesper Lau、Jesper Wengel、Erik B. Pedersen、Bent Faber Vestergaard
DOI:10.1055/s-1991-28417
日期:——
α,β-Unsaturated aldehyde 2 prepared from tri-O-acetyl-D-glucal was acetalated and benzoylated to give α,β-unsaturated acetal 6. Hydrogenation of the double bond followed by methanolysis resulted in methyl 2,3-dideoxyfuranosyl glycoside 8 which was used for nucleoside coupling with silylated N 6-isobutyrylcytosine and silylated thymine. Protected 3-azido-2,3-dideoxy-arabino-furanose 26 was prepared by 1,4-addition of hydrazoic acid to disilylated α,β-unsaturated aldehyde 24 followed by acetylation. Compound 26 was used for the preparation of 3′-azido-2′,3′-dideoxy-D-arabino-hexofuranosyl nucleosides 28 and 29.
由三-O-乙酰基-D-葡萄糖制备的α,β-不饱和醛2经缩醛化和苯甲酰化得到α,β-不饱和缩醛6。双键氢化,随后甲醇解产生甲基2,3-二脱氧呋喃糖基糖苷8,其用于与甲硅烷基化的N 6-异丁酰胞嘧啶和甲硅烷基化的胸腺嘧啶进行核苷偶联。 受保护的3-叠氮基-2,3-二脱氧-阿拉伯-呋喃糖26 是通过将叠氮酸1,4-加成到二甲硅烷基化的α,β-不饱和醛24 上然后乙酰化来制备的。化合物26用于制备3'-叠氮基-2',3'-二脱氧-D-阿拉伯-呋喃己糖核苷28和29。