- Trimethylsilylesters of Fluorobenzenesulfonic acids
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Fluorobenzenesulfonic acids were prepared by electrophilic sulfonation of fluorobenzenes 1.The acids are obtained as hydrates and converted to their trimethylsilyl esters 2 for characterization.
- Johannsen, Heiner,Sartori, Peter
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p. 674 - 679
(2007/10/02)
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- Sulfosilylation of Aromatic Hydrocarbons by Trimethylsilyl Chlorosulfonate
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Aromatic hydrocarbons 2 ,6 ,8 ,9 ,13 ,16 ,18 ,19 ,22 react with trimethylsilyl chlorosulfonate (1) to give trimethylsilyl arenesulfonates 5, 7, 11, 12, 15, 23 or sulfonic acids 17, 20, 21.If trimethylsilyl sulfonates are obtained, working up of the sulfonation mixtures is possible by distillation.By hydrohalogenolysis of trimethylsilyl sulfonates 5 at 0-5 deg C anhydrous sulfonic acids 3 result.The pathways to diphenylsulfone (25a) in the reaction of benzene (2a) with 1 were investigated.In this connection we succeeded in synthesizing benzenepyrosulfonic acid (28) and trimethylsilyl benzenepyrosulfonate (29).
- Hofmann, Karin,Simchen, Gerhard
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p. 282 - 297
(2007/10/02)
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