Process for the preparation of 1-aminoanthraquinones

Details Process for the preparation of 1-aminoanthraquinones Process for the preparation of 1-aminoanthraquinones

1987-10-19

1988-09-13

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260381, C07C 9724

Patent

active

047708182

ABSTRACT:
There is disclosed a process for the preparation of 1-aminoanthraquinones from 5-nitro-1,4,4a,9a-tetrahydroanthraquinones with a basic reducing agent, which process is carried out under pressure in the temperature range above 100.degree. C. and in an aqueous-organic medium. The process affords very pure 1-aminoanthraquinone, which is, inter alia, an important intermediate.

REFERENCES:
patent: 3966775 (1976-06-01), Fukui et al.
patent: 3994932 (1976-11-01), Iwamura et al.
patent: 4549989 (1985-10-01), Schmutz et al.
*U.S. equivalent to German 2,450,883 cited in p. 1 of this specification.

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