Title:
METHOD FOR PRODUCING 2-HYDROXY-1,4-NAPHTHOQUINONE
Document Type and Number:
WIPO Patent Application WO/2017/033557
Kind Code:
A1
Abstract:
Provided is a method for producing a large amount of 2-hydroxy-1,4-naphthoquinone with a high yield and at a low cost. This method comprises oxidizing 2-hydroxynaphthalene with hydrogen peroxide water in the presence of a vanadium catalyst in (1) an alkaline aqueous solution or (2) a mixture of an alkaline aqueous solution and an inactive organic solvent which is incompatible with water.
Inventors:
KAKINUMA SEIJI (JP)
Application Number:
PCT/JP2016/068869
Publication Date:
March 02, 2017
Filing Date:
June 24, 2016
Export Citation:
Assignee:
AGRO-KANESHO CO LTD (JP)
International Classes:
C07C46/04; C07C50/32; C07B61/00
Foreign References:
| JP2009051737A | 2009-03-12 |
Other References:
YUZO NAGASE ET AL: "Oxidation of Naphthols with Hydrogen Peroxide in Alkaline Media", JOURNAL OF THE PHARMACEUTICAL SOCIETY OF JAPAN, vol. 74, no. 1, 1954, pages 9 - 13, XP055365497
YAN YAN ET AL: "Selective catalytic oxidation of naphthol to 2-hydroxyl-1,4-naphthoquinone by hydrogen peroxide over metalloporphyrin catalysts", JOURNAL OF MOLECULAR CATALYSIS A: CHEMICAL, vol. 157, no. 1-2, 2000, pages 65 - 72, XP055365507
HAZRA BANASRI ET AL: "Vanadium (V) In Perchloric Acid : A Novel Use Of The Reagent For Dimerisation Of Some Naphthalene Derivatives", SYNTHETIC COMMUNICATIONS, vol. 29, no. 9, 1999, pages 1571 - 1576, XP055515569
See also references of EP 3339283A4
YAN YAN ET AL: "Selective catalytic oxidation of naphthol to 2-hydroxyl-1,4-naphthoquinone by hydrogen peroxide over metalloporphyrin catalysts", JOURNAL OF MOLECULAR CATALYSIS A: CHEMICAL, vol. 157, no. 1-2, 2000, pages 65 - 72, XP055365507
HAZRA BANASRI ET AL: "Vanadium (V) In Perchloric Acid : A Novel Use Of The Reagent For Dimerisation Of Some Naphthalene Derivatives", SYNTHETIC COMMUNICATIONS, vol. 29, no. 9, 1999, pages 1571 - 1576, XP055515569
See also references of EP 3339283A4
Attorney, Agent or Firm:
NISHIJIMA Takaki et al. (JP)
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