Method for producing trimer of indole derivative, and trimer...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C548S455000

Reexamination Certificate

active

07115751

ABSTRACT:
The present invention provides an industrial method that allows to produce an indole derivative trimer with high purity in mass, as well as novel indole derivative trimers obtainable by the method, having high conductivity, high oxidation—reduction potential, high oxidation—reduction capacity, and the excellent cycle characteristics. The present invention relates to a method of producing an indole derivative trimer comprising the step of oxidizing an indole derivative in a reaction solution containing an organic solvent and to the novel trimers produced by the method.

REFERENCES:
patent: 5290891 (1994-03-01), Billaud et al.
Paola Manini et al.: “Acid-promoted competing pathways in the oxidative polymerization of 5,6-dihydroxyindoles and related compounds: straight forward cyclo- trimerization routes to diindolocarbazole derivatives” J. Org. Chem., vol. 63, pp. 7002-7008 1998.
Peter Jennings et al.: “Electrooxidation of 5-substituted indoles” J. Chem. Soc., Faraday Trans., vol. 93, No. 21, pp. 3791-3797 1997.
Luceido Greci et al.: “Oxidative trimerization of indole: on the formation of dictations and radical cations by reaction of indole and nitrosobenzene in the presence of acids” J. Chem. Soc., Perkins Trans. 2, No. 11, pp. 2337-2342 2000.
G. Kokkindis et al.: “Electrochemical behaviour of nitroindoles: oxidative electropolymerization and reduction of the nitro group of polymerized and non-polymerized 4-nitro and 5-nitroindole” Journal of Electroanalytical Chemistry, vol. 414, pp. 197-208 1996.
Takao Kaneko et al.: “A novel Indole trimer, dilndolo[2,3-a:2′,3′-c]carbazole” HETEROCYCLES, vol. 12, No. 4, pp. 471-473 1979.
Takao Kaneko et al.: “Reactions of indole with hydroxyl radicals and X-ray crystal structure of a novel indole trimer, 14-acetyldiindolo[2,3-a: 2′,3′-c]carbazole” Chem. Pharm. Bull, vol. 29, No. 12, pp. 3499-3506. 1981.
Vittorlo Bocchi et al.: “The synthesis and structural characterization of a charge transfer complex of iodine trimer” Synthetic Metals, vol. 80, pp. 309-313 1996.

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