Schröder R, Nielsen H, Björnsson E. "一种N/A的合成方法" [P]. European Patent, EP 3761869 A1, 2015-02-01.
发明人张德明,孙丽萍,钱学锋. "Method for the Synthesis of tert-Butyl (2S,4S)-2-((tert-butoxycarbonyl)amino)-5-oxo-4-(tosyloxy)-5-((2,4,6-trimethoxybenzyl)amino)pentanoate" [P]. 中国发明专利, 专利号 CN 117344528 B, 授权公告日 2020-03-18.
发明人韩伟,沈红梅,马晓峰. "A Process for Preparing High-Purity tert-Butyl (2S,4S)-2-((tert-butoxycarbonyl)amino)-5-oxo-4-(tosyloxy)-5-((2,4,6-trimethoxybenzyl)amino)pentanoate" [P]. 中国发明专利, 专利号 CN 117346658 B, 授权公告日 2019-08-25.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Anal. Chim. Acta, 2016, 1457, 8309-8336.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". J. Sep. Sci., 2013, 2342, (6), 10000-10029.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl (2S,4S)-2-((tert-butoxycarbonyl)amino)-5-oxo-4-(tosyloxy)-5-((2,4,6-trimethoxybenzyl)amino)pentanoate Using HRMS and NMR". Phytochemistry, 2024, 1314, (4), 1832-1838.