1-(O-acyl-blocked-ss-D-ribofuranosyl)-1,2,4-triazoles which are substituted in position 3 and have the formula I where Ac and Y have the meaning stated in Claim 1 are prepared by reacting corresponding triazoles with corresponding ribofuranone derivatives. The acyl groups can be eliminated by hydrolysis from the compounds of the formula I according to the invention. The hydrolysed products can in turn be used to prepare corresponding phosphorylated compounds of the general formula V in which Y has the same meaning as in formula I, and at least one of the Z radicals has the meaning of an acyl group of phosphoric acid while the other Z radical either likewise has the meaning of an acyl radical of phosphoric acid or is a hydrogen atom. The hydrolysed products are then esterified to give the phosphoric esters of the formula V. The compounds of the formula I, as well as the 1-(ss-D-ribofuranosyl)-1,2,4-triazole-3-carboxamide-nucleosides obtained on hydrolysis thereof, display both a considerable antiviral activity and an antitumour activity.
制备了在3号位置取代且具有公式I的Ac和Y具有声明中所述含义的1-(O-酰基阻断-ss-D-核糖呋喃基)-1,2,4-三唑。方法是将相应的三唑与相应的核糖呋喃衍生物反应。根据本发明,可以通过水解从公式I的化合物中消除酰基基团。水解产物反过来可以用来制备具有公式V的相应磷酸化合物,其中Y具有与公式I相同的含义,并且至少一个Z基团具有磷酸酰基的酰基含义,而另一个Z基团则同样具有磷酸酰基的酰基含义或者是氢原子。然后将水解产物酯化以给出公式V的磷酸酯。公式I的化合物以及由其水解得到的1-(ss-D-核糖呋喃基)-1,2,4-三唑-3-羧酰胺核苷具有相当的抗病毒活性和抗肿瘤活性。