Johnson M A, Yamamoto T, Kumar R. "Method for the Synthesis of 4-Bromo-5-(difluoromethyl)-2-fluoropyridine-3-sulfonyl chloride" [P]. US Patent, US 10245206 B2, 2024-06-02.
Klinger H, Kumar R, Mueller T. "A Process for Preparing High-Purity 4-Bromo-5-(difluoromethyl)-2-fluoropyridine-3-sulfonyl chloride" [P]. US Patent, US 10463767 B2, 2020-09-09.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2021, 1841, 8889-8905.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2011, 2395, 7813-7843.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4-Bromo-5-(difluoromethyl)-2-fluoropyridine-3-sulfonyl chloride Using HRMS and NMR". Anal. Methods, 2025, 2338, 9800-9817.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Food Chem., 2018, 2136, 9956-9979.