Patent ID: 7922799
Filing Date: 2011-04-12
Classification: C09B,Y10T

Abstract:
1. Compounds of Formula (1) and salts thereof: wherein: R R R R L is a direct bond or a divalent linking group; x is 0.1 to 3.8; y is 0.1 to 3.8; wherein the substituents represented by x, y and z are bound to the phthalocyanine ring only through the β-position and the compounds of formula (1) and salts thereof are prepared by a process which comprises cyclisation of appropriate β-sulfo substituted phthalic acid, phthalonitrile, iminoisoindoline, phthalic anhydride, phthalimide or phthalamide optionally in the presence of a suitable nitrogen source, a copper or nickel salt and a base followed by chlorination and then reaction with groups of formula HNR