发明人罗永刚,陈志强,钱学锋. "Method for the Synthesis of Tert-butyl 7,7-difluoro-7,8-dihydro-4H-pyrazolo[1,5-a][1,4]diazepine-5(6H)-carboxylate" [P]. 中国发明专利, 专利号 CN 108843399 A, 授权公告日 2016-10-06.
发明人韩伟,李文辉,林芳. "A Process for Preparing High-Purity Tert-butyl 7,7-difluoro-7,8-dihydro-4H-pyrazolo[1,5-a][1,4]diazepine-5(6H)-carboxylate" [P]. 中国发明专利, 专利号 CN 112972475 A, 授权公告日 2022-03-16.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2012, 979, 2382-2408.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2011, 2342, (3), 6552-6579.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 7,7-difluoro-7,8-dihydro-4H-pyrazolo[1,5-a][1,4]diazepine-5(6H)-carboxylate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2016, 1554, 3935-3960.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2024, 877, 3041-3053.