Meta-halogenated dibenzylphenols

Details Meta-halogenated dibenzylphenols Meta-halogenated dibenzylphenols

1989-11-13

1990-12-18

Lone, Werren B.

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

Organic compounds

Oxygen containing

568718, C07C 3912

Patent

active

049788094

ABSTRACT:
Thermally stable methylene-bridged polyphenols such as 2,4-bis(4-hydroxy-3,5-dimethyl)-3,5-dibromo-6-methylphenol are prepared by contacting (1) a substituted phenol having at least one halogen substituted on the aromatic ring in a position meta to the phenolic hydroxyl and at least one halomethyl group substituted on the aromatic ring in a position ortho or para to the phenolic hydroxyl with (2) and o,o-dialkylphenol having hydrogen on the aromatic ring position which is para to the phenolic hydroxyl under alkylation conditions.

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patent: 3053803 (1962-09-01), Jaffe et al.
patent: 3281478 (1966-10-01), Farnham
patent: 3925488 (1975-12-01), Shin
patent: 4415724 (1983-11-01), Mark et al.
patent: 4532059 (1985-07-01), Rosenberger
patent: 4731423 (1988-03-01), Mendoza et al.
patent: 4778936 (1988-10-01), Mizuno et al.

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