L-Proline catalyzed synthesis of Betti bases and biscoumarin derivatives
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Abstract:
The direct three component modified Mannich reaction via condensation of aldehydes, 2-naphthol or 2,7-naphthalendiol and piperidine to generate Betti bases has been carried out over L-proline (20 mol%) with high efficiency under solvent free conditions at 70 OC. Also, the reaction of aromatic aldehyde and 4-hydroxycoumarin in the presence of L-proline (20 mol%) in the ethanol under reflux conditions, lead to biscoumarin derivatives
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Journal title
volume 5 issue 2
pages 149- 153
publication date 2015-06-01
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