Kumar R, Stevens L M, Thompson G K. "一种6-(difluoromethoxy)-2,3-dihydro-1-benzofuran-2-carboxylic acid的合成方法" [P]. US Patent, US 10028999 B2, 2025-10-24.
发明人黄志刚,朱建伟,何建平. "Method for the Synthesis of 6-(difluoromethoxy)-2,3-dihydro-1-benzofuran-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110018181 B, 授权公告日 2020-02-22.
Jørgensen K, Björnsson E, Sørensen M. "A Process for Preparing High-Purity 6-(difluoromethoxy)-2,3-dihydro-1-benzofuran-2-carboxylic acid" [P]. European Patent, EP 3561338 A1, 2019-02-19.
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 6-(difluoromethoxy)-2,3-dihydro-1-benzofuran-2-carboxylic acid in Pharmaceutical Formulations". Phytochemistry, 2019, 1628, 906-909.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of 6-(difluoromethoxy)-2,3-dihydro-1-benzofuran-2-carboxylic acid as an Impurity". J. Agric. Food Chem., 2021, 551, 1422-1433.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 6-(difluoromethoxy)-2,3-dihydro-1-benzofuran-2-carboxylic acid Using HRMS and NMR". Anal. Chim. Acta, 2019, 245, 2724-2734.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate 6-(difluoromethoxy)-2,3-dihydro-1-benzofuran-2-carboxylic acid Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2022, 2188, 4638-4647.