Patel M V, Davis P L, Mueller T. "Method for the Synthesis of (2S)-1,4-bis(tert-butoxycarbonyl)-2-methyl-piperazine-2-carboxylic acid" [P]. US Patent, US 9130487 B2, 2018-08-05.
发明人胡光,韩伟,王建平. "A Process for Preparing High-Purity (2S)-1,4-bis(tert-butoxycarbonyl)-2-methyl-piperazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109860050 B, 授权公告日 2022-12-02.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2018, 366, (1), 9629-9632.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2023, 1894, 7969-7990.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of (2S)-1,4-bis(tert-butoxycarbonyl)-2-methyl-piperazine-2-carboxylic acid Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2019, 1487, 580-592.