| 摘要 |
Mixtures of four .alpha.-alkoxy-substituted phthalocyanine isomers, predominantly (II) and (III), or of four .beta.-alkoxy-substituted phthalocyanine isomers, where Me is a divalent metal atom or a divalent oxo metal, R1 is a linear or branched C1-C16alkyl, C3-C16alkenyl or C3-C16alkynyl radical which is unsubstituted or substituted by C1-C12alkoxy, -CN, NO2, halogen, -OH, phenyl, cyanophenyl, nitrophenyl, halophenyl, hydroxyphenyl or (C1-C12alkoxy)phenyl, wherein two isomers of the formula II and of the formula III make up at least 80 % of the total mixture and the two other isomers make up at most 20 % of the total mixture, with the ratio between the compounds of the formula II and the compounds of the formula III being from 0.3 to 3.0:1. The isomer mixtures can be obtained by reacting .alpha.- or .beta.-alkoxyphthalodinitriles in the presence of a metal salt, a Lewis acid, a nitroaromatic compound as solvent and at least equimolar amounts of urea, based on the phthalodinitrile. |
