Steric and electronic parameters of 4'-substituents play significant roles in steering the conformation of nucleoside analogues. In order to investigate the relationship of 4'-substituent with antiviral enhancement, novel 4'-phenyl-5'-norcarbocyclic adenosine phosphonic acid analogues were racemically synthesized via de novo acyclic stereoselective route from propionaldehyde 5. The phenyl substituted cyclopentenols 15a and 15b as key intermediates were successfully constructed via reiterative carbonyl addition of Grignard reagents and ring-closing metathesis of corresponding divinyl 14. The synthesized nucleoside phosphonic acids analogues 19, 20, 21, and 23 were subjected to antiviral screening against HIV-1.
                                    4'- 取代基的立体和电子参数在引导核苷类似物的构象方面发挥着重要作用。为了研究 4'-取代基与增强抗病毒能力之间的关系,研究人员从
丙醛 5 出发,通过新的无环立体选择性路线,外消旋合成了新型 4'-苯基-5'-非羰基环
腺苷膦酸类似物。作为关键中间体的苯基取代
环戊烯醇 15a 和 15b 是通过
格氏试剂的重申羰基加成和相应的二
乙烯基 14 的闭环偏析成功合成的。对合成的核苷
膦酸类似物 19、20、21 和 23 进行了抗 HIV-1 病毒筛选。