METHOD FOR PRODUCING 1,2-BENZISOTHIAZOL-3-ONE COMPOUND

WIPO Patent Application WO/2012/127996

A1

The present invention provides a method for producing a 1,2-benzisothiazol-3-one compound whereby the alkyl halide by-product that is generated when a 2-(alkylthio)benzonitrile compound and a halogenation agent are reacted in the presence of water is reacted with a sulfide to become an alkylthiol and then, as an alkali metal salt, is reacted with a 2-halobenzonitrile compound in order to be converted to a 2-(alkylthio)benzonitrile compound and reused as a starting material for the production of a 1,2-benzisothiazol-3-one compound. By means of the present invention, it is possible to efficiently use the by-product that is generated during the production of a 1,2-benzisothiazol-3-one compound and economically produce a 1,2-benzisothiazol-3-one compound without placing a burden on the environment.

KANDA HISAAKI (JP)
KONISHI HIROTSUGU (JP)
YAMAGUCHI HIROKI (JP)

PCT/JP2012/054893

September 27, 2012

February 28, 2012

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SUMITOMO SEIKA CHEMICALS (JP)
KANDA HISAAKI (JP)
KONISHI HIROTSUGU (JP)
YAMAGUCHI HIROKI (JP)

C07D275/04; B01J31/02; C07C319/14; C07C323/62; C07B61/00

JPH08134051A	1996-05-28
JPH06145139A	1994-05-24

MCMURRY YUKI: "Kagaku", vol. 2, 1 October 1998, pages: 664 - 665, XP008172137
See also references of EP 2687520A4

SAEGUSA & PARTNERS (JP)
Patent business corporation 3 Edakuni [Hajime] patent firm (JP)

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