| 摘要 |
PURPOSE:To obtain a compound useful as a cationic polymerization initiator, etc., having improved photosensitive properties, by a simple operation in high purity in high yield, by reacting a specific aromatic sulfide compound with a sulfoxide compound in sulfuric acid. CONSTITUTION:An aromatic sulfide compound containing at least two benzene nuclei directly bonded by a sulfide bond and hydrogen bonded to at least one p-position of the benzene nuclei is reacted with a sulfoxide compound shown by the formula I (R1 and R2 are aliphatic or aromatic group, which may be bonded to form ring) in sulfuric acid at room temperature to give the aimed substance. The aimed substance is a sulfate or hydrogensulfate of an aromatic sulfonium containing a sulfonio group shown by the formula II at the para- position to which hydrogen of at least one benzene nucleus of the aromatic sulfide compound is bonded. The amount of the sulfuric acid used is >= an equimolar amount, preferably >= three times the molar amount of the compound shown by the formula I.
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