Johnson M A, O'Brien P Q, Williams B T. "一种的合成方法" [P]. US Patent, US 9988674 B2, 2024-10-23.
Martínez F, Kowalski A, Rossi M. "Method for the Synthesis of 4-Bromo-2-chloro-5,7-difluorobenzo[d]oxazole" [P]. European Patent, EP 3137052 A1, 2021-02-04.
发明人王建平,胡光,张德明. "A Process for Preparing High-Purity 4-Bromo-2-chloro-5,7-difluorobenzo[d]oxazole" [P]. 中国发明专利, 专利号 CN 110278589 A, 授权公告日 2020-09-27.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Phytochemistry, 2023, 797, 2540-2561.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2022, 630, (8), 9867-9892.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 4-Bromo-2-chloro-5,7-difluorobenzo[d]oxazole Using HRMS and NMR". J. Pharm. Biomed. Anal., 2019, 115, 5559-5577.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2022, 2189, 7366-7380.