Monoalkali metal salts of perylene-3,4,9,10-tetracarboxylic acid

Details Monoalkali metal salts of perylene-3,4,9,10-tetracarboxylic acid Monoalkali metal salts of perylene-3,4,9,10-tetracarboxylic acid

1983-02-10

1985-02-26

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546 37, C07D31178

Patent

active

045019061

ABSTRACT:
Perylene-3,4,9,10-tetracarboxylic acid monoanhydride mono-sodium or mono-potassium salts are obtained from neutral salts of perylene-3,4,9,10-tetracarboxylic acid, if necessary in the presence of at least one molar equivalent of sodium or potassium ions, at 20.degree. to 100.degree. C. by adding three molar equivalents of a sufficiently strong acid. The products are dye precursors, especially for asymmetric N-substituted perylenetetracarboxylic acid diimide pigments.

REFERENCES:
patent: 3628976 (1971-12-01), Stocker
patent: 3872103 (1975-03-01), Fabian

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