Process for preparing 4,4'-dibenzoylaminodianthrimidecarbazole

Details Process for preparing 4,4'-dibenzoylaminodianthrimidecarbazole Process for preparing 4,4'-dibenzoylaminodianthrimidecarbazole

1982-11-29

1985-05-28

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20980

Patent

active

045202028

ABSTRACT:
Process for preparing 4,4'-dibenzoylaminoanthrimidecarbazole, characterized in that 4,4'-diaminodianthrimide is benzoylated and carbazolated, both steps being carried out in one-vessel fashion and the 4,4'-diaminodianthrimide having been obtained by oxidizing a mixture of 1-aminoanthraquinone and 1,4-diaminoanthraquinone in a molar ratio of 0.9:1 to 1.4:1 in 30 to 60% strength H.sub.2 SO.sub.4 and then reducing.

REFERENCES:
patent: 1550504 (1977-11-01), Schmidt
patent: 3230232 (1966-01-01), Carr
Houben-Weyl, Band 7, Teil III, 4. Auflage, Chinone, Georg Thieme Verlag, Stuttgart, DE.

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