Preparation of 7,16-dichlorodianthraquinone-N,N'-dihydroazine

Details Preparation of 7,16-dichlorodianthraquinone-N,N'-dihydroazine Preparation of 7,16-dichlorodianthraquinone-N,N'-dihydroazine

1993-06-23

1994-11-22

Shah, Mukund J.

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544341, C07D24146

Patent

active

053670744

ABSTRACT:
7,16-Dichlorodianthraquinone-N,N'-dihydroazine (I) ##STR1## is prepared by condensing 1-amino-3-chloroanthraquinone (II) in the presence of an alkaline condensing aid, of an oxidizing agent and of a urea derivative (III) ##STR2## (R: identical or different alkyl groups having 1 to 4 carbon atoms, which may be joined together to form a 5- or 6-membered ring that contains the urea group).

REFERENCES:
patent: 3839322 (1974-10-01), Moergieli
patent: 4628091 (1986-12-01), Kato
Industrial and Engineering Chemistry, 369-375, 1929.
Journal of the Society of Chemical Industry Japan, 193B-195B, 1938.
Journal of the American Chemical Society, 56, 2130-31, 1934.

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