发明人刘建华,郑宇鹏,周伟. "Method for the Synthesis of tert-Butyl 1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxylate" [P]. 中国发明专利, 专利号 CN 117753791 B, 授权公告日 2025-12-25.
Nielsen H, Schröder R, Rossi M. "A Process for Preparing High-Purity tert-Butyl 1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxylate" [P]. European Patent, EP 3208489 A1, 2022-02-22.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2012, 622, (9), 5334-5359.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2020, 1659, (9), 5362-5373.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxylate Using HRMS and NMR". J. Sep. Sci., 2018, 224, 2175-2204.