专利号:US-2024409495-A1 优先权日:2021-10-20 标 题 :Process for the preparation of 2,7-dihydroxy-9-fluorenone useful for the synthesis of tilorone and its salts 发明人:JAISANKAR PARASURAMAN; DEB INDUBHUSAN; BHATTACHARJEE PINAKI 权利人:COUNCIL SCIENT IND RES 摘要:Methods involving preparation of building blocks of 2,7-dihydroxy-9-fluorenone toward the synthesis of tilorone dihydrochloride salt and other salts (bromide, iodide, fluoride, citrate, oxalate, maleate, phosphate, tartrate, triflate, trifluoroacetate, tetrafluoroborate) of tilorone, and an efficient, safe, cost effective method for the preparation of 2,7-bis-[2-(diethylamino)ethoxy]-fluorenone-9 and its various salts are developed. The methods involve oxygenation of fluorene, nitration of fluorenone, followed by reduction and diazotization toward the formation of 2,7-dihydroxy-9-fluorenone, which is the key intermediate for the formation of 2,7-bis-[2-(diethylamino)ethoxy]-9-fluorenone-dihydrochloride (Tilorone dihydrochloride) and other tilorone salts. The synthesis method has relatively simple operation, mild reaction conditions, high yield, and simple process with yields of 80-97%. Subsequent product purification of this method uses filtration and crystallization methods, avoiding the existing methods of column chromatography. Therefore, the research of its synthetic method being with a wide range of applications from the drug development and material synthesis point of view.
专利号:WO-2023067624-A1 优先权日:2021-10-20 标 题 :A process for the preparation of 2,7-dihydroxy-9-fluorenone useful for the synthesis of tilorone and its salts
专利号:CN-118175999-A 优先权日:2021-10-20 标题 :Process for the preparation of 2, 7-dihydroxy-9-fluorenone useful for the synthesis of telulone and its salts
专利号:CA-3235754-A1 优先权日:2021-10-20 标 题 :A process for the preparation of 2,7-dihydroxy-9-fluorenone useful for the synthesis of tilorone and its salts
专利号:EP-0617288-B1 优先权日:1993-03-19 标题 :Long emission wavelength chemiluminescent compounds and their use in test assays 发明人:LAW SAY-JONG; JIANG QINGPING; FISCHER WALTER; UNGER JOHN T; KRODEL ELIZABETH K 权利人:NOVARTIS AG; BAYER AG 摘要:An assay method incorporating at least two different chemiluminescent compounds for detection and/or quantitation of at least two substances in a test sample is described. The synthesis of chemiluminescent reagents or conjugates for use in such methods as well as kits incorporating such reagents are also disclosed. The assays have particular application in the field of clinical diagnostics.
专利号:US-7189749-B2 优先权日:1999-06-25 标 题 :Substituted phenoxyacetic acids 发明人:VAN ZANDT MICHAEL C 权利人:INST FOR PHARM DISCOVERY INC 摘要:Disclosed are substituted phenoxyacetic acids useful in the treatment of chronic complications arising from diabetes mellitus. Also disclosed are pharmaceutical compositions containing the compounds, alone or in combination with other therapeutic agents, and methods of treatment employing the compounds and pharmaceutical compositions, as well as methods for their synthesis.
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合成参考文献
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