| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for easily and efficiently producing uncolored high-purity bisphenolfluorenes with a high clarity. SOLUTION: Fluorenone is condensed with a phenol [e.g. 2-(1-4C)alkylphenol] in the presence of a thiol compound (e.g.β-mercaptopropionic acid) and sulfuric acid; then, the resultant reaction mixture is neutralized and is freed of an aqueous phase to give an organic layer; and a crystallization solvent comprising a hydrocarbon (e.g. toluene) and a polar solvent [e.g. a ketone (e.g. acetone), an alcohol, or a nitrile] is added to the organic layer to precipitate crystals, giving a bisphenolfluorene [e.g. 9,9-bis(1-4C-alkylhydroxyphenyl)fluorene]. COPYRIGHT: (C)2003,JPO
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