Design, Synthesis, and Antiviral Evaluation of 2-Deoxy-D-Ribosides of Substituted Benzimidazoles as Potential Agents for Human Cytomegalovirus Infections
作者:Ruiming Zou、Etsuko Kawashima、George A. Freeman、George W. Koszalka、John C. Drach、Leroy B. Townsend
DOI:10.1080/15257770008033000
日期:2000.1
Stereoselective glycosylation of 2,5,6-trichlorobenzimidazole (1b), 2-bromo-5,6-dichlorobenzimidazole (1c), 5,6-dichlorobenzimidazole (1d), 5,6-dichlorobenzimidazole-2-thione (1e), 5,6-dichloro-2-(methylthio)benzimidazole (1f), 2-(benzylthio)-5,6-dichlorobenzimidazole (1g), and 2-chloro-5,6-dimethylbenzimidazole (1h) with 2-deoxy-3,5-di-O-p-toluoyl-alpha-D-erythro-pentofuranosyl chloride was achieved to give the
2,5,6-三氯苯并咪唑(1b),2-溴-5,6-二氯苯并咪唑(1c),5,6-二氯苯并咪唑(1d),5,6-二氯苯并咪唑-2-硫酮(1e),5的立体选择性糖基化带有2-deoxy-3的1,6-二氯-2-(甲硫基)苯并咪唑(1f),2-(苄硫基)-5,6-二氯苯并咪唑(1g)和2-氯-5,6-二甲基苯并咪唑(1h),获得了5-二-对-甲苯甲酰基-α-D-赤型五呋喃糖酰氯,得到所需的β-核苷2b-h。随后的脱保护得到相应的游离β-D-2-脱氧核糖苷3b-h。通过用甲醇甲醇钠处理2b来合成2-甲氧基衍生物3i。用叠氮化锂置换2b的2-氯基,然后去除保护基,得到2-叠氮基-5,6-二氯苯并咪唑衍生物(5)。通过在阮内镍上氢解5获得2-氨基衍生物(6)。使用2'-脱氧尿苷(7),N-脱氧核糖呋喃糖基转移酶和1d制备5,6-二氯-2-异丙基氨基-1-(2-脱氧-β-D-赤-呋喃呋喃糖基)苯并咪唑(1