d-ribofuranosyl azides. A direct conversion of 1-O-acyl-2,3-O-isopropylidene-d-ribofuranose into d-ribofuranosyl azides
作者:Marshall W. Logue、Byung Hee Han
DOI:10.1016/0008-6215(83)84025-7
日期:1983.9
Abstract Reactions of azidotrimethylsilane with 1-O-acetyl-2,3,5-tri-O-benzoyl-β- d -ribofuranose (2), and the 1,5-di-O-p-nitrobenzoyl and 1,5-di-O-acetyl derivatives, 4 and 5 respectively, of 2,3-O-isopropylidene-β- d -ribofuranose, in the presence of the Lewis acids aluminum chloride, titanium tetrachloride, or boron trifluoride etherate were studied. All three Lewis acids readily catalyze the quantitative
摘要叠氮基三甲基硅烷与1-O-乙酰基-2,3,5-三-O-苯甲酰基-β-d-呋喃呋喃糖(2),1,5-二-Op-硝基苯甲酰基和1,5-二-研究了在路易斯酸,氯化铝,四氯化钛或三氟化硼醚化物存在下的2,3-O-异亚丙基-β-d-核呋喃糖的O-乙酰基衍生物,分别为4和5。所有三种路易斯酸都容易催化2定量转化为其β-d-呋喃核糖基叠氮化物,而只有氯化铝才是将4和5转化为其叠氮化物的合适催化剂。三氟化硼醚化物无效,四氯化钛引起部分分解。与仅得到叠氮化物β的2的行为相反,以4和5以优异的产率得到叠氮化物的异头混合物,其中β叠氮化物占优势。