The role of metallic modifiers of SBA-15 supports for propyl-amines on activity and selectivity in the Knoevenagel reactions
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- 作者：Vanesa Calvino-Casildaa ; vcalvino@ccia.uned.es" class="auth_mail" title="E-mail the corresponding author ; Magdalena Olejniczakb ; Rosa Marí ; a Martí ; n-Arandaa ; Maria Ziolekb ; ziolek@amu.edu.pl" class="auth_mail" title="E-mail the corresponding author
- 关键词：Knoevenagel condensation ; Acid-base bifunctional catalysts ; SBA-15 functionalized APTMS
- 刊名：Microporous and Mesoporous Materials
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：224
- 期：Complete
- 页码：201-207
- 全文大小：1090 K
文摘
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Bifunctional catalysts have acid–base synergetic effects on the Knoevenagel condensation.
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Basic oxygen abstracts protons from ethyl acetoacetate and diethyl malonate.
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Amine groups acting as basic centres abstract proton from ethyl cyanoacetate.
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Lewis acid centers play a significant role in the reaction with ethyl acetoacetate and diethyl malonate.
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The nature of metal species influences the activity but not the selectivity.