9,9-BIS(ALKYL SUBSTITUTED-4-HYDROXYPHENYL)FLUORENE AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain the subject new compound useful as a raw material of a highly heat resistant and highly transparent polyester resin, polyether resin, polyimide resin and epoxy resin and as a raw material of an optical material having a large refractive index and transparency, or the like. ;SOLUTION: This 9, 9 bis(an alkyl-substituted-4-hydroxyphenyl)fluorene is a compound of formula I [R1 is H or methyl; R2 is a 2-4C alkyl, 5C or 6C cycloalkyl or the like; (n) is 1, 2], e.g. 9,9-bis(4-hydroxy-3-isopropylphenyl) fluorene. The compound of formula I is obtained by reacting 1 pt.mol 9- fluorenone with preferably 4-8 pts.mol alkylphenols of formula II (e.g.; o- isopropylphnol) in the presence of an acid catalyst (e.g.; hydrogen chloride gas or a conc. hydrogen chloride), by preferably simultaneously using an alkylmercaptane, and preferably using a reaction solvent (e.g.; methanol) at 20-80°C. The alkylmercaptane is used 3-20 mol.% based on the 9-fluorenone.;COPYRIGHT: (C)2000,JPO