Process for the preparation of monoaminoanthraquinones

Details Process for the preparation of monoaminoanthraquinones Process for the preparation of monoaminoanthraquinones

1983-10-11

1985-10-29

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260380, 260381, 260371, C07C 9724, C07C 9726

Patent

active

045499896

ABSTRACT:
The invention relates to a process for the preparation of monoaminoanthraquinones of the formula ##STR1## wherein R is a non-ionic substituent and n is 0, 1, 2 or 3, by reduction of corresponding mononitroanthraquinones, which process comprises reacting said mononitroanthraquinones with formaldehyde, in the presence of a base and a catalyst, in an aqueous alcoholic solution.

REFERENCES:
patent: 4016182 (1977-04-01), Buecheler
Takeda et al., Chemical Abstract, vol. 87, No. 39178k, 1/11/77.
Muller & Bayer, Methoden der Organischen Chemie (Houben-Weyl), Band VII/3c, 1974, pp. 158-160.

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