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Abstract

This invention relates to a phthalocyanine or its metal complex of a divalent metal, oxometal, halogenometal or hydroxymetal, which comprises at least one unsubstituted or substituted formyl, carbonyl, hydroxymethyl or carboxyl group which as attached at the peripheral carbon skeleton. These phthalocyanines or their derivatives are used in recording layers of optical recording media. There is also claimed a novel process for the preparation of some of these compounds corresponding to formula III ##STR1## wherein M is a divalent metal, oxometal, halogenometal or hydroxymetal, or 2 hydrogen atoms, X is halogen, or 2 X in vicinal position on a phenyl ring form together a --C.dbd.C--C.dbd.C-- bridge so that an additional phenyl ring is obtained, Y is --OR.sub.1, --OOC--R.sub.2, --NHR.sub.1, --N(R.sub.1)R.sub.2 or --SR.sub.1, x is 0 or a number from 1 to 8, y depending on z is a number from z to 4, and z is a number from 1 to 4, by reacting a compound of formula IV ##STR2## wherein M, X, Y, x and y are as defined in formula III, with z mol each of dimethylformamide and phosphoryl chloride.

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First Claim