The present invention provides a method of preparing a sulfonyl ether comprising the steps of: v) reacting a sulfonic acid with an anhydride, under continuous vacuum distillation conditions, to form a carboxysulfonate; vi) reacting the carboxysulfonate with an optionally substituted cycloalkane ring containing at least 3 heteroatoms to form a sulfonyl ether pre-mix comprising a sulfonyl ether and at least two additional reaction products each containing at least one ether linkage; vii) subjecting the pre-mix to continuous vacuum distillation conditions to remove at least some of the additional reaction products from the sulfonyl ether pre-mix to provide a crude sulfonyl ether product; and viii) purifying the crude sulfonyl ether product.
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Page/Page column 7-8
(2008/12/07)
α-(TRIALKYLSILYL)-, α-(TRIALKYLGERMYL)-, AND α-(TRIALKYLSTANNYL)-ALKANESULFONIC ESTERS AND AMIDES AND TRIMETHYLSILYL SULFONATES: THEIR SYNTHESIS AND SOME OF THEIR REACTIONS
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Shipov, A. G.,Baukov, Yu. I.
p. 1642 - 1657
(2007/10/02)
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