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    • 5. 发明申请
    • Process for producing triarylsulfonium salt
    • US20070083060A1
    • 2007-04-12
    • US10576299
    • 2004-10-04
    • Motoshige SuminoKazuhito FukasawaShigeaki ImazekiTetsuya Watanabe
    • Motoshige SuminoKazuhito FukasawaShigeaki ImazekiTetsuya Watanabe
    • C07C319/22
    • C07C381/12
    • [Subject] To provide a method for effectively producing a triarylsulfonium salt having a structure that only one aromatic ring of three aromatic rings on the cation portion thereof is different from the other two aromatic rings (hereinafter, abbreviated as a triarylsulfonium salt relating to the present invention) in a high yield without forming any byproduct. [Means for Solution Problems] The present invention relates to a method for producing a triarylsulfonium salt represented by the general formula [4]: wherein, two R1's represent each hydrogen atom, halogen atom, alkyl group, lower haloalkyl group, alkoxy group, acyl group, hydroxyl group, amino group, nitro group or cyano group; R represents an aryl group which may have a substituent selected from a halogen atom, an alkyl group, a lower haloalkyl group, an alkoxy group, an alkylthio group, a N-alkylcarbamoyl group and a carbamoyl group, and the above substituent is different from one represented by the above R1; and A1 represents a strong acid residue, comprising reacting a diaryl sulfoxide represented by the general formula [1]: wherein, R1 represents the same as above, and an aryl Grignard reagent represented by the general formula [2]: RMgX   [2]wherein, X represents a halogen atom; R represents the same as above, in the presence of an activator with high affinity for oxygen of 3 to 7.5 equivalents relative to the above diaryl sulfoxide, and then reacting the resultant reaction mixture with a strong acid represented by the general formula [3]: HA1   [3] wherein, A1 represents the same as above, or a salt thereof.