Di-O-acetyl sucrose was regioselective synthesized by using dibutyltin oxide in about 60% yield. The structure of acetyl derivative was elucidated by 1H NMR, 13C NMR, 2D-NMR and MS spectral data.
A method was established of reversed-phase high performance liquid chromatography for the determination of sucrose-6-acetate.In the method,SupelcosilTMLC-18(250mm×4.6mm i.d.5μm)was used as chromatographic colu...A method was established of reversed-phase high performance liquid chromatography for the determination of sucrose-6-acetate.In the method,SupelcosilTMLC-18(250mm×4.6mm i.d.5μm)was used as chromatographic column and V(acetonitrile)∶V(methanol)∶V(water)=10∶10∶80 as mobile phase.The linear ranges was 0.5mg/L~900mg/L.The lower limit of detection of surose-6-acetate was 0.2mg/L.The recovery of the method was 98.53% and the relative standard deviations was 0.95%.By the method,the reaction raw materials,the reaction mediates and the reaction products could be separated effcctively,and the reaction progress could also be indicated directly.展开更多
N-acetyl-2-thiazolidinethione(Ⅰ),N-propanoyl-2-thiazolidinethione(Ⅱ),N-acetylbenzotriazole(Ⅲ),N-propanoylbenzotriazole(Ⅳ),N-acetoxybenzotriazole(Ⅴ) and N-propanoxybenzotriazole(Ⅵ) were first synthesized.The resu...N-acetyl-2-thiazolidinethione(Ⅰ),N-propanoyl-2-thiazolidinethione(Ⅱ),N-acetylbenzotriazole(Ⅲ),N-propanoylbenzotriazole(Ⅳ),N-acetoxybenzotriazole(Ⅴ) and N-propanoxybenzotriazole(Ⅵ) were first synthesized.The resulting active reagents reacted with sucrose to obtain sucrose-2-esters,followed by an intramolecular shift mechanism to afford the final product sucrose-6-esters with the best yield of 73.1% in the presence of the catalyst 1,8-diazabicycloundec-7-ene(DBU).It’s indicated that the acyl regents using 2-thiazolidinethione as leaving group possess favorable regioselectivity from the experimental data in synthesizing sucrose-6-acetate(1) and propanoate(2).展开更多
文摘Di-O-acetyl sucrose was regioselective synthesized by using dibutyltin oxide in about 60% yield. The structure of acetyl derivative was elucidated by 1H NMR, 13C NMR, 2D-NMR and MS spectral data.
文摘A method was established of reversed-phase high performance liquid chromatography for the determination of sucrose-6-acetate.In the method,SupelcosilTMLC-18(250mm×4.6mm i.d.5μm)was used as chromatographic column and V(acetonitrile)∶V(methanol)∶V(water)=10∶10∶80 as mobile phase.The linear ranges was 0.5mg/L~900mg/L.The lower limit of detection of surose-6-acetate was 0.2mg/L.The recovery of the method was 98.53% and the relative standard deviations was 0.95%.By the method,the reaction raw materials,the reaction mediates and the reaction products could be separated effcctively,and the reaction progress could also be indicated directly.
文摘N-acetyl-2-thiazolidinethione(Ⅰ),N-propanoyl-2-thiazolidinethione(Ⅱ),N-acetylbenzotriazole(Ⅲ),N-propanoylbenzotriazole(Ⅳ),N-acetoxybenzotriazole(Ⅴ) and N-propanoxybenzotriazole(Ⅵ) were first synthesized.The resulting active reagents reacted with sucrose to obtain sucrose-2-esters,followed by an intramolecular shift mechanism to afford the final product sucrose-6-esters with the best yield of 73.1% in the presence of the catalyst 1,8-diazabicycloundec-7-ene(DBU).It’s indicated that the acyl regents using 2-thiazolidinethione as leaving group possess favorable regioselectivity from the experimental data in synthesizing sucrose-6-acetate(1) and propanoate(2).