A synthesis of 2-β-D-ribofuranosyl-4-selenazolecarboxamide (selenazofurin) and certain<i>N</i>-substituted amide derivatives suitable for large scale syntheses
作者:P. Dan Cook、Dennis J. Mcnamara
DOI:10.1002/jhet.5570230132
日期:1986.1
A new process suitable for large scale synthesis of the antitumor-antiviral agent, 2-β-D-ribofuranosyl-4-selenazolecarboxamide (selenazofurin, 1), has been developed. Thus, 1-O-acetyl-2,3,5-tri-O-benzoyl-β-D-ribofuranose (3) was converted with cyanotrimethylsilane and stannic chloride to the crystalline 2,5-anhydro-3,4,6-tri-O-benzoyl-β-D-allononitrile (4) without chromatography. Cyanosugar 4 in ethanol
已经开发出一种适合大规模合成抗肿瘤-抗病毒剂2-β-D-呋喃呋喃糖基-4-硒代唑羧酰胺(硒代氮呋喃,1)的新方法。因此,将1 - O-乙酰基-2,3,5-三-O-苯甲酰基-β-D-呋喃呋喃糖(3)与氰基三甲基硅烷和氯化锡转化为结晶的2,5-脱水-3,4,6-。不经色谱法的三-O-苯甲酰基-β-D-丙腈(4)。用硒化氢气体处理乙醇中的氰基糖4,以立体定型提供不稳定的2,5-脱水-3,4,6-三-O-苯甲酰基-β-D-丙二醛酰胺(5),将其原位转化通过溴丙酮酸乙酯制得稳定的2-(2,3,5-三-O-苯甲酰基-β-D-呋喃呋喃糖基)-4-硒代苯甲酸乙酯(6)。用甲醇钠使硒代唑乙酯6脱保护,得到2-β-D-呋喃呋喃糖基-4-硒代苯甲酸甲酯羧酸酯(7),将其氨化以提供硒代硒氢呋喃(1)或与其他胺一起提供N-取代的硒代呋喃呋喃酰胺。