P2O5/SiO2 as a New, Efficient and Reusable Catalyst for Preparation of 4,4′-Epoxydicoumarins Under Solvent-free Conditions
An efficient solvent-free procedure for the preparation of 4,4′-epoxydicoumarins via the ondensation of 4-hydroxycoumarin with aldehydes in the presence of catalytic amount of phosphorus pentoxide/silica gel at 110 °C is described. The advantages of this method are generality, high yields, short re...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2011-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2011/849795 |
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