Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1990-12-12
1992-08-04
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568717, 568723, 568726, C07C 3718, C07C 3912
Patent
active
051361108
ABSTRACT:
The invention is a process for the preparation of triaromatic bisphenols reacting a phenolic compound, e.g. phenol, with a suitable halo-compound, for instance 1,1-dichloroethylbenzene, 1-chlorostyrene, or mixtures thereof. The reaction may be conducted in the presence or absence of a solvent; an excess of the phenolic compound can serve as the solvent. The product is conveniently recovered by removing the by-product HCl, excess phenolic compound, excess solvent and cooling. Yields of bis-1,1-(4-hydroxyphenyl)-1-phenylethane which are greater than 90% of theoretical have been obtained by the reaction of phenol and 1,1-dichloroethylbenzene and a large portion of the yield is para isomer. Suitable halo-compounds include aromatic dihalo-compounds having at least one aliphatic substituent having two alpha-halogen atoms and at least one beta halogen atom, halo-styrenes having structures corresponding to such aromatic dihalo-compounds except that an alpha-halogen atom and a beta hydrogen atom are removed and there is a double bond between the alpha and beta carbon atoms, trihalotoluenes, and dihalocyanotoluenes.
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Richey W. Frank
Tasset Emmett L.
Walters Marlin E.
Lone Werren B.
The Dow Chemical Company
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