Process for the preparation of monoaroylated 1,4-diaminoanthraqu

Details Process for the preparation of monoaroylated 1,4-diaminoanthraqu Process for the preparation of monoaroylated 1,4-diaminoanthraqu

1980-09-05

1982-04-13

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260374, 260378, C07C143665

Patent

active

043247326

ABSTRACT:
In a process for the preparation of monoaroylated 1,4-diaminoanthraquinone by contacting 1,4-diaminoanthraquinone with an aroyl halide in the presence of an organic solvent and an acid-binding agent and in the presence of a small amount of water at an elevated temperature, the improvement which comprises carrying out the process in the presence of a tertiary aliphatic aminoalcohol and/or quaternary ammonium compound and commencing the reaction at a temperature of 20.degree. to 50.degree. C. and, after addition of the aroyl halide, completing the reaction at a temperature of 80.degree. to 130.degree. C.

REFERENCES:
patent: 1867058 (1932-07-01), Buchloh et al.
patent: 2129991 (1938-09-01), Deinet
patent: 3651099 (1972-03-01), Perlinger et al.

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