Selectivity Enhancement of Silica-Supported Sulfonic Acid Catalysts in Water by Coating of Ionic Liquid

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• 作者：Yanlong Gu ; Ayman Karam ; Franç ; ois Jé ; rô ; me ; Jo&euml ; l Barrault
• 刊名：Organic Letters
• 出版年：2007
• 出版时间：August 2, 2007
• 年：2007
• 卷：9
• 期：16
• 页码：3145 - 3148
• 全文大小：116K
• 年卷期：v.9,no.16(August 2, 2007)
• ISSN：1523-7052

文摘

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Coating of silica-supported sulfonic acid catalysts with hydrophobic ionic liquid leads to a significant improvement of catalyst selectivity.Many organic reactions, including Prins cyclization, cycloaddition of epoxide to aldehyde, and dehydrative etherification of secondary benzylalcohols, proceed well in formalin or pure water. In particular, tandem dehydration/Prins cyclization reactions of tertiary and secondary alcoholswith formaldehyde were developed for the first time.