Abstract: The present invention relates to a process for the synthesis of 2-carboxyanthraquinone from 2-ethylanthraquinone by oxidation of the said ethyl group by means of a nitric acid solution. Anthra-quinones are used in the manufacture of oxygen-absorbing films which make possible the preparation of packagings suited to the preservation of oxygen-sensitive products, such as foodstuffs.
Abstract: An organic conductive complex comprising an electron donor and an electron acceptor, the electron donor being an anthraquinone derivative represented by formula (1): ##STR1## wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4, which may be the same or different, each represents an electron donating group.
June 27, 1989
Date of Patent:
July 9, 1991
Sumitomo Electric Industries Ltd.
Masaru Matsuoka, Teijiro Kitao, Yo Shimizu