Synthesis of (<i>E</i>)-5-(2-cIOdovinyl)-3′-0-(1-Methyl-1,4-Dihydropyridyl-3 -Carbonyl)-2′-Fluoro-2′-Deoxyuridine (Ivfru-Cds) for Brain Targetted Delivery of Ivfru, an Antiviral Nucleoside
作者:Rakesh Kumar、Edward E. Knaus、Leonard I. Wiebe
DOI:10.1080/07328319308018560
日期:1993.11
(E)-5-(2-lodovinyl)-2'-fluoro-3'-O-(1-methyl-1,4-dihydropyridyl-3-carbonyl)-2'-deoxyuridine (11) was synthesized for future evaluation as a lipophilic, brain-selective, pyrimidine phosphorylase-resistant, antiviral agent for the treatment of Herpes simplex encephalitis (HSE). Treatment of (E)-5-(2-iodovinyl)-2'-fluoro-2'-deoxyuridine (6) with TBDMSCl in the presence of imidazole in DMF yielded the protected 5'-O-t-butyldimethylsilyl derivative (7). Subsequent reaction with nicotinoyl chloride hydrochloride in pyridine afforded (E)-5-(2-iodovinyl)-2'-fluoro-3'-O-(3-pyridylcarbonyl)-5'-O-t-butyldimethylsilyl-2'-deoxyuridine (8). Deprotection of the silyl ether moiety of 8 with n-Bu4N + F- and quaternization of the resulting 3'-O-(3-pyridylcarbonyl) derivative 9 using iodomethane afforded the corresponding 1-methylpyridinium salt 10. The latter was reduced with sodium dithionite to yield (E)-5-(2-iodovinyl)-2'-fluoro-3'-O-(1-methyl-1,4-dihydropyridyl-3-carbonyl)-2'-deoxyuridine (11).
(E)-5-(2-洛德维)-2'-含氟-3'-O-(1-甲基-1,4-二氢吡啶-3-羰基)-2'-脱氧尿idine(11)被制备出来,作为未来评估一种脂溶性、中枢神经系统选择性、吡rido素降磷酸酶鲁棒、抗病毒药物治疗单纯型小细胞热 herpesis 的可能候选药物。在 DMF 溶液中加入 TBDMSHCl 并加入imidazole,6 号化合物(E)-5-(2-碘维)-2'-含氟-2'-脱氧尿idine通过反应获得保护的 5'-O-t-butyldimethylsilyl 通的道路(7)。随后,与对氯尼古丁酸在吡咯中反应,得到(E)-5-(2-碘维)-2'-含氟-3'-O-(3-吡咯羰基)-5'-O-t-butyldimethylsilyl-2'-脱氧尿idine(8)。通过使用 n-Bu4N 和 F- 处理,清除 8 号的硅醚基团,并以碘甲烷对生成的 3'-O-(3-吡咯羰基)产物进行 quaternization,得到 9 号的对应 1-甲基吡咯阳离子(10)。后者被利用亚硫酸亚离子还原得到(E)-5-(2-碘维)-2'-含氟-3'-O-(1-甲基-1,4-二氢吡咯-3-羰基)-2'-脱氧尿idine(11)。