1952
DOI: 10.1039/jr9520004457
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854. Acylation and allied reactions catalysed by strong acids. Part VII. Evidence for the existence of sulphonyl cations (R·SO2+)

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Cited by 5 publications
(2 citation statements)
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“…Dimethoxybenzenes are stable to either zinc chloride or sulfonyl chlorides alone at 150°C. It was proposed (41) that RS02+ is an intermediate in this reaction resembling RCO+. It was assumed to add to the ethereal oxygen, from which methyl carfa onium ion was then eliminated.…”
Section: H2c-ch2mentioning
confidence: 99%
“…Dimethoxybenzenes are stable to either zinc chloride or sulfonyl chlorides alone at 150°C. It was proposed (41) that RS02+ is an intermediate in this reaction resembling RCO+. It was assumed to add to the ethereal oxygen, from which methyl carfa onium ion was then eliminated.…”
Section: H2c-ch2mentioning
confidence: 99%
“…The syntheses of aromatic ketones performed in trifluoroacetic anhydride are all consistent with the ionic mechanism, and the failure of these systems to acylate unactivated aromatic nuclei has been attributed to the relatively low reactivity of these ions (197). Evidence is also available that the synthesis of sulfones can proceed through sulfonylium ions (47) and here too the reactions in trifluoroacetic anhydride are consistent with an ionic mechanism.…”
Section: Ch3coococf3 <=í Ch3co+ + Cf3coo-mentioning
confidence: 61%