Process for the preparation of 1,4-diaminoanthraquinones

Details Process for the preparation of 1,4-diaminoanthraquinones Process for the preparation of 1,4-diaminoanthraquinones

1986-03-26

1987-09-08

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260378, C07C 9724

Patent

active

046922784

ABSTRACT:
The invention relates to an improvement of the process for the preparation of 1,4-diaminoanthraquinones by oxidation of the corresponding 2,3-dihydro-1,4-diaminoanthraquinones with nitrobenzene, which improvement is brought about by carrying out the reaction under reduced pressure.

REFERENCES:
patent: 1776869 (1930-09-01), Tatum
patent: 2207045 (1940-07-01), Wilder
patent: 3040063 (1962-06-01), Walker
patent: 3984425 (1976-10-01), Mori et al.

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