Title:
1,6-NAPHTHALENEDITHIOL AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/176299
Kind Code:
A1
Abstract:
The present invention provides: a naphthalenedithiol which has high purity, while being reduced in the degree of coloring; and a method for producing this naphthalenedithiol. 1,6-naphthalenedithiol according to the present invention has a purity of 99.5% or more in terms of area percentage by means of high-speed liquid chromatography; the content of multimers of 1,6-naphthalenedithiol is 0.2% or less; and this 1,6-naphthalenedithiol has a Gardner color number of 1 or less in a molten state. The multimers of 1,6-naphthalenedithiol may be disulfide dimers. This 1,6-naphthalenedithiol can be produced by subjecting a crude starting material, which contains 1,6-naphthalenedithiol and at least multimers of 1,6-naphthalenedithiol, to distillation so as to distill a fraction that contains 1,6-naphthalenedithiol. The crude starting material may be a solid dried product of a partially purified 1,6-naphthalenedithiol product that is obtained by purification from a reaction mixture.
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Inventors:
MINEYAMA KENJI (JP)
KAZEKAMI YUTAKA (JP)
FUJIHARA HIROKI (JP)
KAZEKAMI YUTAKA (JP)
FUJIHARA HIROKI (JP)
Application Number:
PCT/JP2023/005626
Publication Date:
September 21, 2023
Filing Date:
February 17, 2023
Export Citation:
Assignee:
SUGAI CHEMICAL IND CO LTD (JP)
International Classes:
C07C319/28; C07C321/26
Foreign References:
| US20140319097A1 | 2014-10-30 | |||
| JPH03153664A | 1991-07-01 | |||
| JPS6354356A | 1988-03-08 | |||
| JPH08500341A | 1996-01-16 | |||
| JP2008527413A | 2008-07-24 | |||
| US2463219A | 1949-03-01 | |||
| US9170495B2 | 2015-10-27 |
Other References:
OKA HISASHI, TSUGIO KOJIMA: "Gas-liquid chromatographic analysis of sulfonic acids", BUNSEKI KAGAKU, vol. 28, no. 7, 1 January 1979 (1979-01-01), pages 410 - 414, XP093092935, DOI: 10.2116/bunsekikagaku.28.7_410
TOSHIO NAMBARA: "Studies on Chemotherapeutics for Acid-fast Bacilli. XIII. On Some Compounds Related to Vinyl Sulfone and their Bacteriostatic and Chemical Activities. (2", YAKUGAKU ZASSHI, vol. 75, no. 12, 1955, pages 1560 - 1564, XP009164061
TOSHIO NAMBARA: "Studies on Chemotherapeutics for Acid-fast Bacilli. XIII. On Some Compounds Related to Vinyl Sulfone and their Bacteriostatic and Chemical Activities. (2", YAKUGAKU ZASSHI, vol. 75, no. 12, 1955, pages 1560 - 1564, XP009164061
Attorney, Agent or Firm:
SAKANAKA Hiroshi et al. (JP)
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