Design, Synthesis, and Antiviral Evaluation of 2-Substituted 4,5-Dichloro- and 4,6-Dichloro-1-β-<scp>d</scp>-ribofuranosylbenzimidazoles as Potential Agents for Human Cytomegalovirus Infections
作者:Ruiming Zou、John C. Drach、Leroy B. Townsend
DOI:10.1021/jm960533b
日期:1997.2.1
(14a), and 2-benzylthio (14b) derivatives were prepared via displacement reactions at the 2-position of the 2,3,5-tri-O-acetyl derivative of 7a. 2,4,5-Trichlorobenzimidazole (17a) and 2-bromo-4,5-dichlorobenzimidazole (17b) were synthesized from the corresponding 1,2-phenylenediamines via successive cyclization with cyanogen bromide and diazotization in the presence of an appropriate cupric halide. Ribosylation
2,4-,6-三氯苯并咪唑(4a)和2-溴-4,6-二氯苯并咪唑(4b)的合成通过2-氨基中间体(3)使用温和的重氮化程序完成。4a和4b的核糖基化反应以及随后的脱保护得到相应的2,4,6-三氯-1-β-D-核呋喃糖基苯并咪唑(7a)和2-溴-4,6-二氯-1-β-D-核呋喃糖基苯并咪唑(7b) 。通过在2的2位上进行置换反应制备了2-叠氮基(10),2-氨基(11),2-硫酮(13),2-甲硫基(14a)和2-苄硫基(14b)衍生物。 7a的,3,5-三-O-乙酰基衍生物。由相应的1,2-苯二胺经溴化氰连续环化并在适当的卤化铜存在下重氮化,从而合成了2,4,5-三氯苯并咪唑(17a)和2-溴-4,5-二氯苯并咪唑(17b)。化合物17a和17b的核糖基化反应后,脱保护得到2,4,5-三氯-1-β-D-呋喃呋喃糖基苯并咪唑(20a)和2-溴-4,5-二氯-1-β-D-呋喃呋喃糖基苯并咪唑(