Roberts E F, Thompson G K, O'Brien P Q. "一种的合成方法" [P]. US Patent, US 9055646 B2, 2018-05-23.
Schröder R, Stevens L M, O'Brien P Q. "Method for the Synthesis of tert-Butyl 4-(3-methyl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)piperazine-1-carboxylate" [P]. US Patent, US 10378231 B2, 2022-01-14.
发明人林芳,何建平,冯建国. "A Process for Preparing High-Purity tert-Butyl 4-(3-methyl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)piperazine-1-carboxylate" [P]. 中国发明专利, 专利号 CN 112140536 A, 授权公告日 2023-01-23.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2013, 1205, 6934-6954.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2020, 1942, (1), 356-372.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 4-(3-methyl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)piperazine-1-carboxylate Using HRMS and NMR". Anal. Chim. Acta, 2011, 342, (10), 1172-1182.