Natural Hydroxyapatite Ca 5 (PO 4 ) 3 OH: An Efficient Catalyst for the Chemo- and Regioselective Enamination of the β- Ketoesters

@inproceedings{Firdoussi2016NaturalHC,
  title={Natural Hydroxyapatite Ca 5 (PO 4 ) 3 OH: An Efficient Catalyst for the Chemo- and Regioselective Enamination of the β- Ketoesters},
  author={Larbi El Firdoussi},
  year={2016}
}
Abstract: Hydroxylapatite or hydroxyapatite Ca5(PO4)3OH (Hap), a natural mineral species of the family of phosphate, efficiently catalyzed the condensation of 1,3-ketoesters with primary amines under solvent-free conditions. The reaction was complete in 10 min, to afford β-enamino esters in a high yield and good selectivity. Moreover, the catalyst can be reused for four times with good activities. 

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