Process for producing 1-aminoanthraquinones

Details Process for producing 1-aminoanthraquinones Process for producing 1-aminoanthraquinones

1991-04-08

1992-09-22

Ivy, C. Warren

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

Organic compounds

Polycyclo ring system containing anthracene configured ring...

552249, 552251, C07C21104

Patent

active

051498480

ABSTRACT:
A process for producing 1-aminoanthraquinones represented by the formula (C) ##STR1## wherein R.sup.1 and R.sup.2, independently from each other, denote one type selected from a hydrogen atom, an alkyl group having 1 to 4 carbon atoms and a halogen atom,
which comprises converting 5-nitro-1,4,4a,9a-tetrahydroanthraquinones respresented by formula (A) ##STR2## wherein R.sup.1 and R.sup.2 are as defined above, into 1-hydroxylaminoanthraquinones represented by formula (B) ##STR3## wherein R.sup.1 and R.sup.2 are as defined above, in the presence of a basic compound, and electrolytically reducing the resulting 1-hydroxylaminoanthraquinones in the presence of a basic compound.

REFERENCES:
patent: 3875191 (1975-04-01), Toth
patent: 3966775 (1976-06-01), Fukui et al.
patent: 3994932 (1976-11-01), Iwamura et al.
patent: 4021456 (1977-05-01), Seha
patent: 4804749 (1989-06-01), Ikeda et al.

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