Brown S R, Davis P L, Johnson M A. "Method for the Synthesis of tert-butyl 4-but-3-ynylpiperazine-1-carboxylate" [P]. US Patent, US 11774937 B2, 2025-08-28.
Hughes D C, Roberts E F, Park J H. "A Process for Preparing High-Purity tert-butyl 4-but-3-ynylpiperazine-1-carboxylate" [P]. US Patent, US 11563439 B2, 2022-11-09.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Sci. Total Environ., 2019, 1005, 6385-6396.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2022, 2036, (6), 8595-8603.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of tert-butyl 4-but-3-ynylpiperazine-1-carboxylate Using HRMS and NMR". Molecules, 2014, 1758, 1526-1556.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2013, 236, (4), 2227-2233.