Process for the preparation of 2-(2',4'-dihydroxyphenyl)-4,6-dia

Details Process for the preparation of 2-(2',4'-dihydroxyphenyl)-4,6-dia Process for the preparation of 2-(2',4'-dihydroxyphenyl)-4,6-dia

1990-04-18

1992-01-28

Morris, Patricia L.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544217, 544219, C07D25124

Patent

active

050845705

ABSTRACT:
There is disclosed a process for the preparation of 2-(2',4'-dihydroxyphenyl)-4,6-diaryl-s-triazines of formula (1) as indicated in claim 1, which process comprises reacting, in a first step, a compound of formula (4) as indicated in claim 1, with the aid of a Lewis acid, in the presence of xylene or toluene, with a substituted benzene of formula (5) as indicated in claim 1, and, in a second step, reacting the resultant compound of formula (2) as indicated in claim 1, in the presence of toluene or xylene, with chlorine or sulfuryl chloride, to give the compound of formula (3) as indicated in claim 1, and, in a third step, reacting the resultant compound with 1,3-dihydroxybenzene, with the aid of a Lewis acid, to give the compound of formula (1), in the presence of toluene, xylene or a mixture of xylene isomers.

REFERENCES:
patent: 3118887 (1964-01-01), Hardy
patent: 3242175 (1966-03-01), Duennenberger
patent: 3268474 (1966-08-01), Hardy
Ciba I, "1,3,5-triazine aryl derivatives" CA 62:4041h (1965).
Ciba II, "4-(2-hydroxy-4-alkoxyphenyl) etc." CA 9155h (1965).
Duennenberger et al. "o-hydroxphenyl-s-triazine" CA 72:79103d (1970).
Helv. 55, 1566ff (1972).
Rec.Trav.Chim.Pays Bas 78,967ff (1959).

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