Patent ID: 7045608
Filing Date: 2006-05-16
Classification: C09B

Abstract:
1. A process for the preparation of an azo compound of formula (I) wherein X is O— or —NR Y is —N═ or —CR A is a colourless anion, R R R R R wherein X, Y, A, R R R Q is a bridging member, and m is 0 or 1, or R by reaction of a compound of formula (II) or a mixture of compounds of formula (II) with a compound of formula (III) or with a mixture of compounds of formula (III) wherein all the substituents are as defined above, in an inert solvent or solvent mixture, which process comprises adding to the reaction mixture at least one tertiary amine and/or at least one alcoholate of the formula R wherein R Z is an alkali metal.