New quaternary phosphonium salt as multi-site phase-transfer catalyst for various alkylation reactions

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• 作者：Kottala Vijaya Ponmuthu ; Duraimurugan Kumaraguru…
• 关键词：Multi ; site phase ; transfer catalysts ; Homogeneous catalysis ; Fluorene ; Curcumin ; Tetraalkylation
• 刊名：Research on Chemical Intermediates
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：42
• 期：12
• 页码：8345-8358
• 全文大小：1,015 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Physical Chemistry
  Inorganic Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1568-5675
• 卷排序：42

文摘

The present work describes the C-alkylation reactions of fluorene and curcumin catalyzed by a new phosphonium salt, benzene-1,3,5-triyltris(methylene))tris(triphenylphosphonium)bromide, as a multi-site phase-transfer catalyst (MPTC). The catalytic efficiencies were found to be quite effective for di- and tetra-alkylation reactions with very excellent yields under mild base and low concentrations of the catalyst. The synthesized MPTC 3 have privileged catalytic activity compared to commercially available single-site phase-transfer catalysts.