Imidazolium-Based Ionic Liquids Catalyzed Formylation of Amines Using Carbon Dioxide and Phenylsilane at Room Temperature

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• 作者：Leiduan Hao ; Yanfei Zhao ; Bo Yu ; Zhenzhen Yang ; Hongye Zhang ; Buxing Han ; Xiang Gao ; Zhimin Liu
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：September 4, 2015
• 年：2015
• 卷：5
• 期：9
• 页码：4989-4993
• 全文大小：283K
• ISSN：2155-5435

文摘

The CO₂-involved synthesis of chemicals is of significance. In this work, we found that 1-alkyl-3-methylimidazolium ionic liquids (ILs) had high efficiency for catalyzing the formylation of amines using CO₂ and phenylsilane at room temperature, producing the corresponding formylated products in excellent yields under the metal-free condition. The ILs acted as bifunctional catalysts, which activated the Si鈥揌 bond of phenylsilane to react with CO₂ to form the formoxysilane intermediate and simultaneously activated the amine substrate through the hydrogen bond. Moreover, the imidazolium cation and the anions of the ILs showed an excellent synergistic effect on catalyzing the formylation of amines.