Process for the preparation of hydroxyphenyl-1,3,5-triazines
AssigneeCiba-Geigy Corporation
InventorsDieter Reinehr, Jean P. Bacher
Life of this patent
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Abstract
A simple process for the preparation of a triazine of formula (1) is described, which comprises converting a dihydrotriazine of formula (2) with a reducing agent to a 1,3,5-triazine of formula (1). The triazines obtained by the novel process are suitable UV absorbers for organic materials, in particular for polyester fiber materials, or suitable starting materials for the preparation of UV absorbers.
Claims6
A process for the preparation of a triazine of formula ##STR12## which comprises converting a dihydrotriazine of formula ##STR13## by reacting with a compound sodium dithionite or sodium bisulfite to the compound of formula (1), wherein in formulae (1) and (2)
- R.sub.1, R.sub.2 and R.sub.3 are each independently of one another hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.8 alkoxy or --C.tbd.N.
Dependencies are inferred from the claim text.