Process for the preparation of N,N'-disubstituted 1,4-diaminoant

Details Process for the preparation of N,N'-disubstituted 1,4-diaminoant Process for the preparation of N,N'-disubstituted 1,4-diaminoant

1996-05-03

1997-06-17

Dees, Jose G.

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

Organic compounds

Polycyclo ring system containing anthracene configured ring...

552255, 552258, 552259, C09B 120, C09B 132, C07C 5020

Patent

active

056398964

ABSTRACT:
A process for the preparation of N,N'-disubstituted 1,4-diaminoanthraquinones has been found which is characterized in that 1,4-dihydroxyanthraquinones are reacted with aliphatic or aromatic amines in the presence of a hydroxycarboxylic acid as a condensation auxiliary.

REFERENCES:
patent: 1548768 (1925-08-01), Stowell
patent: 2152191 (1939-03-01), Herrett et al.
patent: 4083683 (1978-04-01), Botros
patent: 4306875 (1981-12-01), De Feo et al.
patent: 4614618 (1986-09-01), Murdock et al.
Chemical Abstract, vol. 80, abstract no. 16445, p. 97, abstract of DE 2,209,984 (1974).
Chemical Abstracts, vol. 72, abstract no. 80352r, pp. 80-81, abstract of DE 1,917,024 (1970).
Patent Abstract of Japan, vol. 011, No. 315, (c-415), abstract of JP 62-101655 (1987).

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