Ring opening of extremely hydrophobic epoxides with water, amines, sodium azide and thiophenol was realized in the mixture solvent of water and 1, 4-dioxane under reflux condition. Hot water was believed to act as a m...Ring opening of extremely hydrophobic epoxides with water, amines, sodium azide and thiophenol was realized in the mixture solvent of water and 1, 4-dioxane under reflux condition. Hot water was believed to act as a mild Bronsted acid catalyst in the epoxide-opening reactions.展开更多
目的:建立恩格列净片有关物质测定的HPLC法。方法:采用辛烷基硅烷键合硅胶为填充剂的色谱柱(ZORBAX Rx-C8,250 mm×4.6 mm,5μm),以p H 3.5的磷酸水溶液为流动相A,甲醇-乙腈(1∶1)为流动相B,梯度洗脱,流速1.0 m L·min^(-1),检...目的:建立恩格列净片有关物质测定的HPLC法。方法:采用辛烷基硅烷键合硅胶为填充剂的色谱柱(ZORBAX Rx-C8,250 mm×4.6 mm,5μm),以p H 3.5的磷酸水溶液为流动相A,甲醇-乙腈(1∶1)为流动相B,梯度洗脱,流速1.0 m L·min^(-1),检测波长224 nm,柱温为25℃,进样量20μL,对有关物质进行定性、定量分析。结果:在选定的色谱条件下,恩格列净与相邻杂质及各杂质之间的分离度均大于1.5;杂质IMPD(恩格列净还原产物)、杂质IMPC(恩格列净开环产物)、杂质EMGA(恩格列净中间体)、杂质IMPF(恩格列净缩合产物)、杂质IMPG(恩格列净脱葡萄糖醇产物)的定量限分别为28.30、53.07、73.60、65.00和395.57 ng,且在各自的线性范围内线性关系良好(r>0.999,n=5),平均回收率(n=9)分别为100.7%、102.9%、97.4%、102.1%和102.9%。对3批恩格列净片进行有关物质测定,结果总杂质量在0.05%~0.06%范围内。结论:经方法学验证,本法简便、灵敏,专属性好,可用于恩格列净片有关物质的测定。展开更多
基金financially supported by the National Natural Science Foundation of China (20402007, 20772065)Program for New Century Excellent Talents in University+1 种基金the 111 Project (B06005)the National High-tech Research & Development Program of China (863 Projcect, 2006AA020502)
文摘Ring opening of extremely hydrophobic epoxides with water, amines, sodium azide and thiophenol was realized in the mixture solvent of water and 1, 4-dioxane under reflux condition. Hot water was believed to act as a mild Bronsted acid catalyst in the epoxide-opening reactions.
文摘目的:建立恩格列净片有关物质测定的HPLC法。方法:采用辛烷基硅烷键合硅胶为填充剂的色谱柱(ZORBAX Rx-C8,250 mm×4.6 mm,5μm),以p H 3.5的磷酸水溶液为流动相A,甲醇-乙腈(1∶1)为流动相B,梯度洗脱,流速1.0 m L·min^(-1),检测波长224 nm,柱温为25℃,进样量20μL,对有关物质进行定性、定量分析。结果:在选定的色谱条件下,恩格列净与相邻杂质及各杂质之间的分离度均大于1.5;杂质IMPD(恩格列净还原产物)、杂质IMPC(恩格列净开环产物)、杂质EMGA(恩格列净中间体)、杂质IMPF(恩格列净缩合产物)、杂质IMPG(恩格列净脱葡萄糖醇产物)的定量限分别为28.30、53.07、73.60、65.00和395.57 ng,且在各自的线性范围内线性关系良好(r>0.999,n=5),平均回收率(n=9)分别为100.7%、102.9%、97.4%、102.1%和102.9%。对3批恩格列净片进行有关物质测定,结果总杂质量在0.05%~0.06%范围内。结论:经方法学验证,本法简便、灵敏,专属性好,可用于恩格列净片有关物质的测定。