申请人:University of Georgia Research Foundation Inc.
公开号:US05159067A1
公开(公告)日:1992-10-27
Compounds of the general formula: ##STR1## wherein A, B, and C are hydrogen, halogen, or azido; D is hydrogen, halogen, azido, or OH; A and B or C and D can be replaced with a double bond; R is an aldohexose, aldohexosamine, or N-acetyl aldohexosamine, R.sub.1 and R.sub.2 are hydrogen or alkyl groups of from C.sub.1 to C.sub.10 ; W is oxygen or sulfur; X is oxygen, sulfur, or CH.sub.2 ; Y is a purine or pyrimidine base, and Z is carbon, sulfur, or oxygen. Y can be any purine or pyrimidine base, natural or synthetic, which combines with a sugar to form a biologically active nucleoside. In combination with an appropriate pharmaceutical carrier, the compositions have enhanced activity or increased intracellular absorbment over the parent nucleoside as a function of the 5'-O-diphosphosugar. Another embodiment of the present invention is the enhancement of biologically active nucleosides into cells by preparing and administering the 5'-O-diphosphohexose, 5'-diphospho-N-acetylhexosamine or 5'-diphosphohexosamine derivative of the nucleoside. In the preferred embodiment for therapeutic use, the compounds are provided in a pharmaceutical carrier in an amount sufficient to exhibit as known in vitro or in vivo biological activity.
一般式为:##STR1## 的化合物,其中A、B和C为氢、卤素或叠氮基;D为氢、卤素、叠氮基或羟基;A和B或C和D可以被双键替换;R为醛基己糖、醛基己糖胺或N-乙酰醛基己糖胺,R.sub.1和R.sub.2为C.sub.1到C.sub.10的氢或烷基;W为氧或硫;X为氧、硫或CH.sub.2;Y为嘌呤或嘧啶碱基,Z为碳、硫或氧。Y可以是任何嘌呤或嘧啶碱基,天然或合成的,与糖结合形成生物活性核苷的。与适当的药物载体结合后,这些组合物具有比母核苷更强的活性或增加细胞内吸收的功能,这是由于5'-O-二磷酸糖的作用。本发明的另一实施例是通过制备和给予核苷的5'-O-二磷酸己糖、5'-二磷酰N-乙酰己糖胺或5'-二磷酸己糖胺衍生物,增强生物活性核苷进入细胞。在治疗用的优选实施例中,这些化合物以足够量提供在体外或体内已知的生物活性,以药物载体的形式提供。