A new group of compounds has been prepared: N-(3-fluoro-2-phosphonomethoxypropyl) (FPMP) derivatives of purine and pyrimidine bases which exhibit a significant selective activity against a broad spectrum of retroviruses. Racemic N-(3-fluoro-2-phosphonomethoxypropyl) derivatives of adenin (V), guanine (IX), cytosine (XIII), 2,6-diaminopurine (XXI), 3-deazaadenin e(XVII), xanthine (X) and hypoxanthin (VI) were prepared from the corresponding N-(3-fluoro-2-hydroxypropyl) derivatives after protection of amino group at the heterocyclic ring by selective benzoylation, reaction with diisopropyl p-toluenesulfonyloxymethylphosphonate (II), and subsequent removal of the protecting groups. Chiral FPMP derivatives were prepared by reaction of heterocyclic base with the corresponding chiral synthon (XXX, XXXVII) followed by deprotection. The required chiral synthons were obtained from enantiomeric 3-fluoro-1,2-propanediols by two methods. In the first, the primary hydroxyl group was tritylated, the obtained derivative was reacted with compound II, the trityl group was removed and the product was mesylated to give synthon XXXVII. The second pathway consisted in selective tosylation of the primary hydroxyl group and conversion of the secondary hydroxyl into the acetoxymethyl ether via the methoxymethyl ether; treatment of the acetoxy compound with bromotrimethylsilane and triisopropyl phosphite afforded the desired synthon XXX.
已合成一组新化合物:嘌呤和嘧啶碱基的N-(3-氟-2-磷甲氧基丙基)(FPMP)衍生物,对广谱逆转录病毒表现出显著的选择性活性。从相应的N-(3-氟-2-羟基丙基)衍生物经过异构环上氨基选择性苯甲酰化、与异丙基对甲苯磺酰氧甲基磷酸二异丙酯(II)反应,以及随后去除保护基制备了腺嘌呤(V)、鸟嘌呤(IX)、胞嘧啶(XIII)、2,6-二氨基嘌呤(XXI)、3-去氧腺嘌呤(XVII)、黄嘌呤(X)和次黄嘌呤(VI)的消旋N-(3-氟-2-磷甲氧基丙基)衍生物。手性FPMP衍生物通过异构碱基与相应的手性合成物(XXX、XXXVII)反应后去保护基制备。所需的手性合成物是通过两种方法从对映异构体3-氟-1,2-丙二醇获得的。在第一种方法中,首要羟基进行三苯甲酰化,得到的衍生物与化合物II反应,去除三苯甲基基团,然后进行甲磺酰化以得到合成物XXXVII。第二种途径包括选择性对磺酰化首要羟基,将次要羟基转化为乙酰氧甲基醚通过甲氧基甲基醚;将乙酰氧化合物与溴三甲基硅烷和三异丙基磷酸酯处理后得到所需的合成物XXX。