1-.beta.-D-Ribofuranosyl-1,2,4-triazole-3-carboxamide is prepared by a process wherein a suitably substituted formimidic acid hydrazide is condensed with a blocked derivative of D-ribose and the intermediate is ring closed with a reagent which donates one carbon atom to yield a 3-substituted-1-(blocked .beta.-D-ribofuranosyl)-1,2,4-triazole. Treatment of this intermediate with ammonia and/or removal of the blocking group yields the product.
1-.beta.-D-Ribofuranosyl-1,2,4-triazole-3-carboxamide是通过以下过程制备的:将适当取代的甲酰胺
肼与
D-核糖的阻断衍
生物缩合,中间体经过环合反应,其中一个碳原子由试剂提供,形成3-取代-1-(阻断的β-
D-核糖呋喃基)-
1,2,4-三唑。将该中间体与
氨和/或去除阻断基即可得到产物。