6-氯-2,′3,′5′-三-O-乙酰基鸟苷是一类有应用价值的核苷类药物中间体.本文以鸟苷为原料,经酰化、氯化合成6-氯-2,′3,′5′-三-O-乙酰基鸟苷.重点研究了酰化过程中溶剂选择、物料配比和反应温度对产品收率的影响.得出的较佳制备工艺...6-氯-2,′3,′5′-三-O-乙酰基鸟苷是一类有应用价值的核苷类药物中间体.本文以鸟苷为原料,经酰化、氯化合成6-氯-2,′3,′5′-三-O-乙酰基鸟苷.重点研究了酰化过程中溶剂选择、物料配比和反应温度对产品收率的影响.得出的较佳制备工艺为:8.5 g鸟苷(30 mmol)溶于10 mL吡啶和25 mL N,N-二甲基甲酰胺(DMF)混合溶剂中,加入18mL(0.3 mol)乙酸酐于80℃反应3 h;将所得产物溶于10 mL DMF和40 mL二氯乙烷混合溶剂中,加入8.3 g氯化四乙铵,滴加14 mL三氯氧磷于85℃微波反应10 m in,即得产品,总产率达75.2%.使用元素分析、核磁共振和质谱对所得产品进行分析,结果表明所得产品为目标产品.展开更多
2-(2,3,5-triazolylazo)-5-acetamidophenol—Nafion modified glassy carbon electrode is prepared.In the B-R buffer solution (pH=5.0),a sensitive anodic peak at-0.50V(vs.SCE) is obtained.The peak current is proportional t...2-(2,3,5-triazolylazo)-5-acetamidophenol—Nafion modified glassy carbon electrode is prepared.In the B-R buffer solution (pH=5.0),a sensitive anodic peak at-0.50V(vs.SCE) is obtained.The peak current is proportional to copper concentration in the range of 2.0×10-8mol/L~5.0×10-6mo1/L,the detection limit is 5.0×10-9mol/L.This method has been successfully applied to the determination of trace copper in water.展开更多
文摘6-氯-2,′3,′5′-三-O-乙酰基鸟苷是一类有应用价值的核苷类药物中间体.本文以鸟苷为原料,经酰化、氯化合成6-氯-2,′3,′5′-三-O-乙酰基鸟苷.重点研究了酰化过程中溶剂选择、物料配比和反应温度对产品收率的影响.得出的较佳制备工艺为:8.5 g鸟苷(30 mmol)溶于10 mL吡啶和25 mL N,N-二甲基甲酰胺(DMF)混合溶剂中,加入18mL(0.3 mol)乙酸酐于80℃反应3 h;将所得产物溶于10 mL DMF和40 mL二氯乙烷混合溶剂中,加入8.3 g氯化四乙铵,滴加14 mL三氯氧磷于85℃微波反应10 m in,即得产品,总产率达75.2%.使用元素分析、核磁共振和质谱对所得产品进行分析,结果表明所得产品为目标产品.
文摘2-(2,3,5-triazolylazo)-5-acetamidophenol—Nafion modified glassy carbon electrode is prepared.In the B-R buffer solution (pH=5.0),a sensitive anodic peak at-0.50V(vs.SCE) is obtained.The peak current is proportional to copper concentration in the range of 2.0×10-8mol/L~5.0×10-6mo1/L,the detection limit is 5.0×10-9mol/L.This method has been successfully applied to the determination of trace copper in water.
基金Project supported by the Natural Sciences Foundation of Beijing(7122114,7102115,NO.BZ0150)National Natural Sciences Foundation of China(81273514/H3102)