Monatshefte für Chemie / Chemical Monthly

, Volume 136, Issue 5, pp 727–731 | Cite as

Tetramethylguanidine-[bmim][BF4]. An Efficient and Recyclable Catalytic System for One-Pot Synthesis of 4H-Pyrans

  • Yanqing Peng
  • Gonghua SongEmail author
  • Feifei Huang


A clean and efficient method for the synthesis of 4H-pyran derivatives through the one-pot condensation of aromatic aldehydes, malononitriles, and β-dicarbonyl compounds, using guanidine base tetramethylguanidine in [bmim][BF4] ionic liquid as a recyclable catalytic system, was described.

Keywords. Ionic liquid; Catalysts; Guanidine; Cyclization; One-pot; 4H-Pyrans. 


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Copyright information

© Springer-Verlag/Wien 2005

Authors and Affiliations

  1. 1.Shanghai Key Laboratory of Chemical BiologyInstitute of Pesticides & Pharmaceuticals, East China University of Science and TechnologyShanghaiChina

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