Nielsen H, Rossi M, Björnsson E. "一种的合成方法" [P]. European Patent, EP 3059545 A1, 2019-09-03.
Thompson G K, Anderson J P, Chen K W. "Method for the Synthesis of Tert-butyl 3-azaspiro[5.5]Undecane-3-carboxylate" [P]. US Patent, US 11686843 B2, 2021-10-08.
Nowak P, Martínez F, Nielsen H. "A Process for Preparing High-Purity Tert-butyl 3-azaspiro[5.5]Undecane-3-carboxylate" [P]. European Patent, EP 3323566 A1, 2016-03-12.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2014, 2259, (3), 476-495.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2010, 244, 8591-8596.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 3-azaspiro[5.5]Undecane-3-carboxylate Using HRMS and NMR". J. Chromatogr. A, 2018, 1136, 7303-7315.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2023, 2419, 7812-7832.