Process for the manufacture of dianthraquinonyl-N,N'-dihydroazin

Details Process for the manufacture of dianthraquinonyl-N,N'-dihydroazin Process for the manufacture of dianthraquinonyl-N,N'-dihydroazin

1981-08-18

1983-02-22

Coughlan, Jr., Paul M.

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

Organic compounds

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

C09B 548

Patent

active

043749895

ABSTRACT:
A process for the manufacture of dianthraquinonyl-N,N'-dihydroazine, which comprises reacting 1-nitroanthraquinone in mixtures of water, alcohols and alkali metal hydroxides at elevated temperature with hydrazine or hydroxylamine compounds, subsequently removing the alcoholic constituents from the reaction mixture, adding dimethyl sulfoxide, and, if desired, further amounts of alkali metal hydroxides, and bringing the reaction to completion at elevated temperature.

REFERENCES:
patent: 3242182 (1966-03-01), Dien
patent: 3268532 (1966-08-01), Zerweck et al.
patent: 4016182 (1977-04-01), Buecheler
Mosley, Chem. Ind. (London), (1959), pp. 1348-1349.

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