Total Synthesis of C-8 Hydroxyl Substituted Lomefloxacin as the Photolysis
Impurity
作者:Laiyou Wang、Si Chen、Ying Wang、Xiao Yuan
DOI:10.2174/1570178618666210914125620
日期:2022.6
1H-NMR, 13C-NMR and HRMS spectroscopes, as well as the purity was determined by HPLC.Conclusion:C-8 hydroxyl substituted Lom was successfully synthesized and purified with purity more than 96%. This photolysis impurity offers an alternative for not only further generic Lom active pharmaceutical ingredient development involved in quality control and consistency evaluation, but also research for the mechanism
目的:洛美沙星(Lom)光化学分解产生C-8取代杂质并伴有氟化物。C-8羟基取代的Lom的存在和数量可以作为稳定性和工艺一致性的标志。设计了特定的 C-8 羟基取代基杂质 (1-ethyl-6-fluoro-8-hydroxy-7-(3-methylpiperazin-1-yl )-4-oxo-1,4-dihydroquinoline-3-carboxy acid)方法:以2,4,5-三氟-3-甲氧基苯甲酸为起始反应物,经过酰化、反式N,N-二甲氨基丙烯酸乙酯缩合等七步反应, N-乙基化、环化、水解、与哌嗪缩合和酸化。然后使用HPLC和C18固相萃取纯化所得物质。用1H-NMR、13C-NMR和HRMS光谱仪对C-8羟基取代的Lom进行了结构鉴定,并用HPLC测定了纯度。结论:成功合成并纯化了C-8羟基取代的Lom,纯度超过96%。这种光解杂质不仅为进一步开发涉及质量控制和一致性评估的通用