Björnsson E, Mueller T C, Martínez F. "一种1-(1-methyl-1H-pyrazol-4-yl)piperazin-2-one的合成方法" [P]. European Patent, EP 3614084 A1, 2022-01-18.
发明人刘建华,沈红梅,周伟. "Method for the Synthesis of 1-(1-methyl-1H-pyrazol-4-yl)piperazin-2-one" [P]. 中国发明专利, 专利号 CN 109494818 B, 授权公告日 2025-11-16.
Lee S K, Schröder R, Roberts E F. "A Process for Preparing High-Purity 1-(1-methyl-1H-pyrazol-4-yl)piperazin-2-one" [P]. US Patent, US 11027789 B2, 2019-06-25.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of 1-(1-methyl-1H-pyrazol-4-yl)piperazin-2-one in Pharmaceutical Formulations". Anal. Chim. Acta, 2024, 1866, (7), 5436-5442.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of 1-(1-methyl-1H-pyrazol-4-yl)piperazin-2-one as an Impurity". Talanta, 2012, 1892, 9384-9411.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 1-(1-methyl-1H-pyrazol-4-yl)piperazin-2-one Using HRMS and NMR". Food Chem., 2023, 127, (2), 8241-8257.