Aromatic polyhydroxy compounds and process for the preparation t

Details Aromatic polyhydroxy compounds and process for the preparation t Aromatic polyhydroxy compounds and process for the preparation t

1992-07-30

1995-01-17

Kight, II, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

528 98, 528176, 528196, 568718, 568722, 568723, C07C 3718, C07C 3912

Patent

active

053827104

ABSTRACT:
The invention involves aromatic polyhydroxy compounds, including triaromatic bisphenols and tris-1,1,1-(4-hydroxyphenyl)] toluenes, and a process for the preparation thereof by 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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