发明人沈红梅,黄志刚,罗永刚. "Method for the Synthesis of Ethyl 5-cyano-1-(pyridin-4-yl)-1H-pyrazole-4-carboxylate" [P]. 中国发明专利, 专利号 CN 113224787 A, 授权公告日 2024-04-08.
Schröder R, Stevens L M, Kumar R. "A Process for Preparing High-Purity Ethyl 5-cyano-1-(pyridin-4-yl)-1H-pyrazole-4-carboxylate" [P]. US Patent, US 11776350 B2, 2022-12-11.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of 5-氰基-1-(4-吡啶基)-1H-吡唑-4-羧酸乙酯 in Pharmaceutical Formulations". J. Agric. Food Chem., 2020, 1461, (2), 3078-3094.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of 5-氰基-1-(4-吡啶基)-1H-吡唑-4-羧酸乙酯 as an Impurity". Biomed. Chromatogr., 2010, 1436, (7), 7335-7339.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5-cyano-1-(pyridin-4-yl)-1H-pyrazole-4-carboxylate Using HRMS and NMR". J. Sep. Sci., 2018, 1875, (1), 2452-2457.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate 5-氰基-1-(4-吡啶基)-1H-吡唑-4-羧酸乙酯 Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2017, 1262, 1819-1823.