deacylation. The synthesis of 1-β-D-ribofuranosyl-3-benzylthio-1,2,4-triazole (15) has also been accomplished by the silylation procedure employing 3-benzylthio-1,2,4-triazole (13) and 5 to give 1-(2,3,5-tri-0-acetyl-β-D-ribofuranosyl)-3-benzylthio-1,2,4-triazole (14). Deacetylation of 14 furnished 15. The structural assignments of 7, 14 and 21 were made by single-crystal X-ray diffraction analysis and
1-β-d-
呋喃核糖基21,1-(2-脱氧β-D- erytftro -pento毛皮anosyl) - 27和1-β-d-arabinofuranosyl- 29个的
1,2,4-三唑-3-衍
生物已经制备了-磺酰胺(19)。的糖基化甲
硅烷基化19与1,2,3,5-四- 0 -乙酰基β-d-D-
呋喃核糖(5中的三甲基
硅烷基
三氟甲磺酸酯的存在下),得到相应的被保护的核苷(20),其上的
氨解,得到1-β -D-
呋喃呋喃糖基-
1,2,4-三唑-3-磺酰胺(21)。19的钠盐与1-
氯-2-脱氧-3,5-二-O的立体特异性糖基化- p
甲苯甲酰-α-D-赤-pentofuranose(22)或1-
氯-2,3,5-三- 0 -苄基α-d阿拉伯
呋喃糖(23)提供相应的保护的核苷26和28,脱保护的26和28布置1-(2-脱氧β-D-赤式-pentofuranosyl)-
1,2,4-三唑-3-磺酰胺(27)和1-β-d阿拉伯
呋喃糖基-1