Process for the preparation of...

C - Chemistry – Metallurgy – 07 – D

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C07D 251/24 (2006.01) C07D 251/22 (2006.01) C07D 251/38 (2006.01)

Patent

CA 2014886

1-17563/= Process for the preparation of 2-(2',4'-dihydroxyphenyl)-4.6-diaryl-s-triazines Abstract of the Disclosure There is disclosed a process for the preparation of 2-(2',4'-dihydroxyphenyl)-4,6-di- aryl-s-triazines of formula (1) as indicated in claim 1, which process comprises 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.

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