Synthesis of 4-(4,6-di-O-benzyl-2,3-dideoxy-β-d-erythro-hex-2-enopyranosyl)pyrazoles from 3,4,6-tri-O-acetyl-d-glucal
作者:Pastora Borrachero-Moya、Francisca Cabrera-Escribano、Manuel Gómez-Guillén、Marı́a del Rocı́o Paredes-León
DOI:10.1016/s0008-6215(98)00059-7
日期:1998.3
1-phenyl-1,3-butanedione derivative were highly regioselective. Catalytic hydrogenation of some of these novel compounds gave the respective 4′,6′-di- O -deprotected-2′,3′-saturated compounds in 51–67% yields. The acetolysis/methanolysis of one of the title compounds led to the formation of the 4′,6′-di- O -debenzylated 2′,3′-unsaturated pyrazole C -nucleoside in poor yield.
摘要3-(4,6-二-O-苄基-2,3-二脱氧-β-d-赤型-己基-2-烯吡喃糖基)-2,4-戊二酮及其类似物2-(4,6-di-由3,4,6-三-O-乙酰基-1,5制备的O-苄基-2,3-二脱氧-β-d-赤-己基-2-烯吡喃糖基)-1-苯基-1,3-丁二酮-脱水-2-脱氧-d-阿拉伯糖-己-1-烯醇(3,4,6-三-O-乙酰基-d-葡糖醛),与肼及其甲基,苯基,对甲苯基和室温下在乙醇中的对甲氧基苯基衍生物,以71–96%的收率提供一系列4-(4,6-二-O-苄基-2,3-二脱氧-β-d-赤-具有被上述基团游离或取代的N-1,和被甲基或苯基取代的C-5的六(2-吡喃并吡喃糖基)-3-甲基吡唑。1-苯基-1,3-丁二酮衍生物的反应是高度区域选择性的。这些新型化合物中的一些经催化氢化后,得到的4',6'-di-O-脱保护的2',3'-饱和化合物的产率为51-67%。标题化合物之一的乙酰水解/甲