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<p>followed by hydrogenation of the resulting sulfolene.</p>

<p>Sulfones are prepared under conditions used for <a href="page.php?w=Friedel-Crafts_reaction">Friedel-Crafts reaction</a>s using sources of  derived from <a href="page.php?w=sulfonyl_halides">sulfonyl halides</a> and <a href="page.php?w=methanesulfonic_anhydride">sulfonic acid anhydrides</a>. <a href="page.php?w=Lewis_acid">Lewis acid</a> catalysts such as  and  are required.</p>

<p>Sulfones have been prepared through <a href="page.php?w=sulfinate">sulfinate</a> anion alkylation. </p><p>
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