Process for the production of cyclic sulfonium salts

Details Process for the production of cyclic sulfonium salts Process for the production of cyclic sulfonium salts

C - Chemistry, Metallurgy

07

D

C07D 333/06 (2006.01) C07D 333/46 (2006.01) C07D 333/54 (2006.01) C07D 333/72 (2006.01) C07D 335/00 (2006.01) C07D 335/02 (2006.01) C07D 335/06 (2006.01) C07D 337/08 (2006.01)

Patent

CA 2096932

54 Abstract A process for the production of a 5-7 membered ring cyclic sulfonium salt compound, including a 5-7 membered ring cyclic sulfonium salt compound having a non-nucleophilic anion, is described. Members of the latter group are potentially useful as initiators for cationic polymerizations. The process comprises reacting a 1,4-, 1,5-, or 1,6-diol compound or a 5-7 membered ring cyclic ether compound with a mercapto compound and a strong protonic acid yielding the cyclic sulfonium salt compound. The process of the invention is general, efficient, and performable in one step under mild reaction conditions, resulting in a product in high yield and purity. Since the reactants can be varied independently, a wide variety of structurally different 5-7 membered ring cyclic sulfonium salt compounds can be produced by the invention, including mono, bis, and higher order sulfonium salts. Some compounds described are also novel compounds per se.

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