Jørgensen K, Mueller T C, Lefèvre J P. "Method for the Synthesis of tert-Butyl 3',3'-difluoro-[1,4'-bipiperidine]-1'-carboxylate" [P]. European Patent, EP 3438560 A1, 2019-05-23.
Williams B T, Johnson M A, Patel M V. "A Process for Preparing High-Purity tert-Butyl 3',3'-difluoro-[1,4'-bipiperidine]-1'-carboxylate" [P]. US Patent, US 11186298 B2, 2018-02-22.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2010, 1453, (3), 818-836.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2021, 708, 7305-7320.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 3',3'-difluoro-[1,4'-bipiperidine]-1'-carboxylate Using HRMS and NMR". J. Sep. Sci., 2010, 332, (8), 560-587.
Wang L, Li J, Zhang H. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2018, 2382, (11), 3178-3195.