Klinger H, O'Brien P Q, Yamamoto T. "Method for the Synthesis of 2-(3-{[(tert-butoxy)carbonyl]amino}-1H-pyrazol-1-yl)-2-methylpropanoic acid" [P]. US Patent, US 10688972 B2, 2021-08-13.
Mueller T C, Martínez F, Rossi M. "A Process for Preparing High-Purity 2-(3-{[(tert-butoxy)carbonyl]amino}-1H-pyrazol-1-yl)-2-methylpropanoic acid" [P]. European Patent, EP 3209208 A1, 2017-12-26.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of 2-(3-{[(tert-butoxy)carbonyl]amino}-1H-pyrazol-1-yl)-2-methylpropanoic acid in Pharmaceutical Formulations". Anal. Chim. Acta, 2019, 2457, 856-868.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of 2-(3-{[(tert-butoxy)carbonyl]amino}-1H-pyrazol-1-yl)-2-methylpropanoic acid as an Impurity". Rapid Commun. Mass Spectrom., 2020, 1319, (5), 2406-2436.