Process for the preparation of benzotriazole derivatives

Details Process for the preparation of benzotriazole derivatives Process for the preparation of benzotriazole derivatives

1996-03-07

1997-10-07

Morris, Patricia L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548259, C07D24920

Patent

active

056750153

ABSTRACT:
2-(2'-Hydroxyphenyl)-2H-benzotriazoles of formula (I): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and Z are defined in the specification, are prepared by catalytic hydrogenation of a suitable o-nitroazo dye compound in the presence of a PtS, Pt, Pd, Pt/Pd or other noble metal hydrogenation catalyst, in the presence of a base, an acid and a hydroxylic solvent.

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