Susceptibility of morpholine substituents to photo-oxidative decomposition-identification of photo-oxidative degradants of linezolid (PNU-100766)
作者:Gary E. Martin、Russell H. Robins、Phil B. Bowman、Wayne K. Duholke、Kathleen A. Farley、Brian D. Kaluzny、Jane E. Guido、Sandra M. Sims、Thomas J. Thamann、Brian E. Thompson、Toshihide Nishimura、Yukimi Noro、Tsutoma Tahara
DOI:10.1002/jhet.5570360140
日期:1999.1
Following preparative chromatographic isolation, the structures of both degradants were determined by mass spectrometric, nmr, and vibrational spectroscopic methods. The degradant structures formed by decomposition involving photo-oxidation of the morpholine, followed by a carbon-carbon bond scission to a formyloxyethylformamide-containing degradant. Facile hydrolytic cleav age of the formate ester in
新型(S)-3-(4'-氟苯基)-5- N利奈唑胺(PNU-100766)的肠胃外制剂按照ICH指南的要求,对-acetamidomethyloxazolidin-2-one抗生素进行了光稳定性测试。对光照射溶液的直接,反相色谱评估显示出两种色谱较宽的降解物。制备型色谱分离后,通过质谱,核磁共振和振动光谱法确定两种降解物的结构。通过分解形成的降解物结构涉及吗啉的光氧化,然后将碳-碳键断裂成含甲酰氧乙基甲酰胺的降解物。甲酸酯在酸性介质中的容易水解裂解,得到了第二种色谱分离的较宽的含N的降解物-2-羟乙基甲酰胺基。甲酰胺取代基在酸性介质中进一步水解为相应的仲胺。