发明人李文辉,唐晓军,刘建华. "一种N/A的合成方法" [P]. 中国发明专利, 专利号 CN 114117660 A, 授权公告日 2018-09-11.
发明人冯建国,李文辉,罗永刚. "Method for the Synthesis of 2-Chloro-4,6-difluoropyridine" [P]. 中国发明专利, 专利号 CN 112363233 A, 授权公告日 2020-01-07.
发明人黄志刚,林芳,王建平. "A Process for Preparing High-Purity 2-Chloro-4,6-difluoropyridine" [P]. 中国发明专利, 专利号 CN 117996666 A, 授权公告日 2022-11-04.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Environ. Sci. Technol., 2022, 1151, (10), 2468-2481.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Rapid Commun. Mass Spectrom., 2014, 2048, (9), 6214-6229.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 2-Chloro-4,6-difluoropyridine Using HRMS and NMR". J. Agric. Food Chem., 2025, 114, (2), 9616-9633.