Halogen Bonded Directly At Alpha Position (i.e., 1-, 4-, 5- Or 8-position) Patents (Class 552/264)
  • Patent number: 6509486
    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.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: January 21, 2003
    Assignee: Atofina
    Inventor: Michel Devic
  • Patent number: 5030387
    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.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: July 9, 1991
    Assignee: Sumitomo Electric Industries Ltd.
    Inventors: Masaru Matsuoka, Teijiro Kitao, Yo Shimizu