Halogenated anthraquinone and their use as near infrared rays ab

Details Halogenated anthraquinone and their use as near infrared rays ab Halogenated anthraquinone and their use as near infrared rays ab

1988-12-28

1994-08-30

Ivy, C. Warren

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

Organic compounds

Polycyclo ring system containing anthracene configured ring...

552258, C07C 5020

Patent

active

053429745

ABSTRACT:
High-purity 1,4,5,8-tetraanilidoanthraquinones which are substituted at the p-position of at least one of four anilido benzene rings by a halogen atom are good near infrared rays absorbing filters and at prepared from high purity 1,4,5,8-tetrachloroanthraquinone by reaction with a correspondingly substituted aniline or mixture of anilines in the presence of a salt of an aliphatic carboxylic acid,. a benzyl alcohol derivative and copper ions as reaction catalyst.

REFERENCES:
patent: 4446047 (1984-05-01), Thompson
patent: 4455253 (1984-06-01), Thompson
patent: 4585574 (1986-04-01), Blunck et al.
patent: 4755012 (1988-07-01), Kojima
Lubs, The Chemistry of Synthetic Dyes and Pigments, 1955, pp. 670-671, 404-405.

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