Process for the preparation of dimethoxyanthraquinones

Details Process for the preparation of dimethoxyanthraquinones Process for the preparation of dimethoxyanthraquinones

1980-01-10

1981-07-14

Garvin, Patrick

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260378, C07C 4974

Patent

active

042786070

ABSTRACT:
Dimethoxyanthraquinones can be prepared in high purity and in good yield in an economic manner which does not pollute the environment when 1 part by weight of dinitroanthraquinone is reacted with 2-8 parts by weight of methanol and 0.5-1.5 parts by weight of potassium hydroxide until all of the nitro groups have been replaced; the reaction is preferably carried out in the presence of 0.05-0.5 part by weight of amidosulphonic acid.

REFERENCES:
patent: 4080370 (1978-03-01), Kimura et al.

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