PROCESS FOR PRODUCING AROMATIC DISULFIDES

WIPO Patent Application WO/2001/012595

A1

A process for producing aromatic disulfides represented by the following general formula (II): Yn-Ar-S-S-Ar-Yn wherein Ar represents an aromatic hydrocarbyl ring; Y represents a monovalent electron attractive group and when n is 2 or more, then Y's may be the same or different; and n is an integer of 1 to 12; characterized by reacting aromatic thioethers (A) represented by the following general formula (I): Yn-Ar-S-R wherein Ar, Y and n are as defined above; and R represents monovalent hydrocarbyl selected from the group consisting of monovalent tertiary hydrocarbyl, benzyl and monovalent secondary hydrocarbyl derived from benzyl; with at least one member selected from among the following (1) to (4): (1) bromine; (2) (a) hydrogen bromide and (b) hydrogen peroxide; (3) (c) chlorine in the presence of a catalytic amount of iodine and/or hydrogen iodide; and (4) (d) hydrogen chloride and (b) hydrogen peroxide in the presence of a catalytic amount of iodine and/or hydrogen iodide.

ARAI ISAMU (JP)
YAMAGUCHI TUTOMU (JP)
HIDA YOKO (JP)

PCT/JP1999/004371

February 22, 2001

August 12, 1999

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NIPPON FINECHEMICAL CO LTD (JP)
ARAI ISAMU (JP)
YAMAGUCHI TUTOMU (JP)
HIDA YOKO (JP)

C07C319/24; C07C323/09; (IPC1-7): C07C319/24; C07C323/09

JPH1045706A

1998-02-17

DICKMAN D. ET AL.: "Oxidative Cleavage of Aryl or Alkyl tert-Butyl Sulfides with Dimethyl Sulfoxide/Hydrobromic Acid to Form Symmetrical Aryl or Alkyl Disulfides", SYNTHESIS, vol. 6, June 1993 (1993-06-01), pages 573 - 574, XP002925545

Tsukuni, Hajime (Toranomon 1-chome Minato-ku Tokyo, JP)

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