Oxalic acid catalyzed solvent-free one pot synthesis of coumarins

Oxalic acid catalyzed solvent-free one pot synthesis of coumarins

Oxalic acid was found to be an efficient catalyst for Pechmann condensation, which includes the reaction between phenols and β-keto esters leading to formation of coumarin derivatives. The advantages of present methods are the use of cheap and easy available catalyst, solvent-free reaction condition...

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Veröffentlicht in:Chinese chemical letters 2007-11, Vol.18 (11), p.1309-1312
Hauptverfasser: Kokare, Nagnnath D., Sangshetti, Jaiprkash N., Shinde, Devanand B.
Format: Artikel
Sprache:eng
Schlagworte:
Coumarins
Oxalic acid
Pechmann condensation
Phenols
Solvent-free reaction
β-Keto esters
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Zusammenfassung:Oxalic acid was found to be an efficient catalyst for Pechmann condensation, which includes the reaction between phenols and β-keto esters leading to formation of coumarin derivatives. The advantages of present methods are the use of cheap and easy available catalyst, solvent-free reaction conditions, better yields and shorter reaction time.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2007.09.008