Copper nanoparticles stabilized on nitrogen-doped carbon nanotubes as efficient and recyclable catalysts for alkyne/aldehyde/cyclic amine A³-type coupling reactions

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• 作者：Vasanthakumar Ganga Ramu^a ; ¹ ; Ankur Bordoloi^b ; ¹ ; Tharamani C. Nagaiah^c ; Wolfgang Schuhmann^c ; Martin Muhler^b ; ^{martin.muhler@rub.de} ; Chiara Cabrele^a ; ^b ; ^{chiara.cabrele@rub.de}
• 关键词：A3 coupling ; Copper catalysis ; Copper nanoparticles ; Heterogeneous catalysis ; Nitrogen-doped carbon nanotubes
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：26 July, 2012
• 卷：431-432
• 期：Complete
• 页码：88-94
• 文件大小：908 K

摘要

Metallic copper nanoparticles have been efficiently dispersed and stabilized on nitrogen-doped carbon nanotubes. They are about 8-10 nm in diameter and highly resistant against bulk oxidation. Their catalytic activity and recyclability have been investigated in A³-type coupling reactions for the synthesis of propargylamines. It was easily possible to prepare diastereomerically pure derivatives of proline and to efficiently recover and reuse the supported catalyst several times.