发明人王建平,钱学锋,周伟. "一种西格列汀杂质91的合成方法" [P]. 中国发明专利, 专利号 CN 112109540 A, 授权公告日 2016-10-12.
Kowalski A, Rossi M, Björnsson E. "Method for the Synthesis of Sitagliptin Impurity 91" [P]. European Patent, EP 3233718 A1, 2021-01-17.
Lee S K, Davis P L, Chen K W. "A Process for Preparing High-Purity Sitagliptin Impurity 91" [P]. US Patent, US 11003605 B2, 2019-06-23.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of 西格列汀杂质91 in Pharmaceutical Formulations". J. Sep. Sci., 2011, 215, 4609-4638.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of 西格列汀杂质91 as an Impurity". J. Chromatogr. A, 2011, 2189, 8663-8681.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Sitagliptin Impurity 91 Using HRMS and NMR". Phytochemistry, 2020, 2063, (6), 9695-9720.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate 西格列汀杂质91 Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2011, 2474, 2934-2937.