Synthesis of New Nucleosides by coupling of chloropurines with 2- and 3-deoxy derivatives ofN-methyl-D-ribofuranuronamide
作者:Rosaria Volpini、Emidio Camaioni、Sauro Vittori、Luciano Barboni、Catia Lambertucci、Gloria Cristalli
DOI:10.1002/hlca.19980810113
日期:1998.1.12
The synthesis of new deoxyribose nucleosides by coupling chloropurines with modified D-ribose derivatives is reported. The methyl 2-deoxy-N-methyl-3-O-(p-toluoyl)-α-D-ribofuranosiduronamide (α-D-8) and the corresponding anomer β-D-8 were synthesized starting from the commercially available 2-deoxy-D-ribose (1) (Scheme 1). Reaction of α-D-8 with the silylated derivative of 2,6-dichloro-9H-purine (9)
报道了通过将氯嘌呤与修饰的D-核糖衍生物偶联来合成新的脱氧核糖核苷。从商购可得的2-开始,合成了甲基2-脱氧-N-甲基-3- O-(对甲苯甲酰基)-α-D-呋喃呋喃基硅二硼酰胺(α-D- 8)和相应的端基异构体β-D- 8。脱氧-D-核糖(1)(方案1)。α-D- 8与2,6-二氯-9 H-嘌呤的甲硅烷基化衍生物(9)反应,选择性地提供N 9-(2'-脱氧核糖核苷)10异头混合物(方案2)),而β-D- 8没有反应。9或6-氯-9 H-嘌呤(17)与1,2-二-O-乙酰基-3-脱氧-N-甲基-β-D-核呋喃核糖酰胺(13)的糖基化仅产生受保护的β-D -端基异构体14和18(方案3)。随后的脱乙酰基和脱氯得到所需的核苷β-D- 11,β-D- 12,15和16。3'-脱氧-2-氯腺苷衍生物15对A的腺苷结合位点显示出最高的亲和力和选择性1和A 2A腺苷受体亚型。