117344-32-8Relevant articles and documents
Synthesis of fluorenebisphenoxy derivatives by acid-sulfur compound catalyzed condensation reaction
Yamada, Mitsuaki,Sun, Jun,Suda, Yasuhiro,Nakaya, Tadao
, p. 1055 - 1056 (1998)
An efficient method for the synthesis of fluorenebisphenoxy derivatives from fluorenone and phenoxy compounds is successfully performed by the combined use of concentrated sulfuric acid as catalyst and 3-mercaptopropionic acid as co-catalyst. Several fluorenebisphenoxy derivatives are obtained in good yields by this one-step reaction.
Synthesis method of 9, 9-di [4-(2-hydroxyethoxy) phenyl] fluorene
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Paragraph 0036-0060, (2021/01/15)
The invention discloses a synthesis method of 9, 9di [4 -(2-hydroxy ethoxy) phenyl] fluorene, and belongs to the technical field of chemical synthesis. 9-fluorenone, phenoxyethanol, a catalyst and a cocatalyst are stirred and heated to reflux in an alkane solvent, generated water is removed from a reaction solution in an azeotropic manner while reaction is performed, water is added for dilution after the reaction is finished, the mixture is stirred uniformly, cooled, crystallized and filtered, a filter cake is rinsed and dried, and a 9, 9-di [4- (2-hydroxy ethoxy) phenyl] fluorene finished product is obtained; standing and layering the crystallized mother liquor obtained by filtering, removing a water phase, distilling an organic phase to recover the alkane solvent, and rectifying a concentrate to recover phenoxyethanol. The method has the advantages of cheap and easily available raw materials, simple operation, good atom economy, high synthesis yield, good product quality, environmental friendliness and the like, and is suitable for industrial application.
9,9-BIS(4-(2-HYDROXYETHOXY)PHENYL)FLUORENE CRYSTAL
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Paragraph 0056; 0077; 0084, (2018/04/21)
PROBLEM TO BE SOLVED: To produce 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene crystal which shows a melting peak by a differential scan calorimetry in a temperature region of 115-125°C and has a bulk density of 0.60-0.75 g/cm3. SOLUTION: Fluorenone and phenoxy ethanol are reacted to obtain rough crystal of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, and the rough crystal is purified to prepare purified crystal of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene having the enhanced degree of purity to at least 99%. The purified crystal is dissolved in a mixed solvent of acetonitrile and methanol of which a temperature is controlled to -20°C to 5°C to prepare a solution, and crystal is precipitated in the solution. When the precipitated crystal is separated and dried, the target 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene crystal is obtained. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
9, 9 - bis (4 - (2 - hydroxyethoxy) phenyl) fluorene crystal
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Paragraph 0056, (2017/11/04)
[Problem] differential scanning calorimetry melting peak is observed in the temperature range of 115 d 125 °C, and, the bulk specific gravity of 0.60-to 0.75 g/cm3 9, 9 - bis (4 - (2 - hydroxyethoxy) phenyl) fluorene in new production method of crystals. 9, 9 - bis [a] (4 - (2 - hydroxyethoxy) phenyl) fluorene in the reaction phenoxyethanol yielded crude fluorene, 9, 9 - bis at least 99% purity of the purified crude crystal (4 - (2 - hydroxyethoxy) phenyl) can be enhanced by preparation of crystals of fluorene. Methanol mixed solvent refined crystal controlled temperature - 20 c 5 °C acetonitrile solution was prepared by dissolving, in this solution to precipitate crystals, separating and drying the deposited crystals, 9, 9 - bis (4 - (2 - hydroxyethoxy) phenyl) fluorene crystal method. Figure 2 [drawing]