6285-61-6Relevant academic research and scientific papers
Silica sulfuric acid as an efficient and reusable catalyst for the pechmann synthesis of coumarins under solvent-free conditions
Dabiri, Minoo,Salehi, Peyman,Zolfigol, Mohammad Ali,Baghbanzadeh, Mostafa
, p. 677 - 682 (2008/03/12)
Silica sulfuric acid is used as an efficient catalyst in the Pechmann condensation of phenols with β-keto-esters leading to the formation of coumarin derivatives in excellent yields under solvent-free conditions. It was found that the catalyst could be recycled and reused for several runs.
Alum (KAl(SO4)2·12H2O) catalyzed one-pot synthesis of coumarins under solvent-free conditions
Dabiri, Minoo,Baghbanzadeh, Mostafa,Kiani, Shadi,Vakilzadeh, Yasamin
, p. 997 - 999 (2008/03/17)
Alum (KAl(SO4)2·12H2O) is used as an efficient catalyst in the Pechmann condensation of phenol derivatives with β-keto esters leading to the formation of coumarins in excellent yields under solvent-free conditions. This methodology offers significant improvements for the synthesis of coumarins with regard to the yield of products, simplicity in operation, and green aspects by avoiding toxic catalysts and solvents.
Vanadium(III) chloride as an effective catalyst for the Pechmann reaction
Sunil Kumar,Kumar,Srinivasulu,Rajitha,Thirupathi Reddy,Narsimha Reddy,Udupi
, p. 172 - 175 (2007/10/03)
Good yields of substituted coumarins were obtained by a synthetic method involving the Pechmann reaction using vanadium(III)chloride (VCl3) reagent to effect this condensation under solvent-free conditions. 2006 Springer Science+Business Media, Inc.
Selectfluor: A simple and efficient catalyst for the synthesis of substituted coumarins under solvent-free conditions
Kumar, B. Sunil,Reddy, Y. Thirupathi,Reddy, P. Narsimha,Kumar,Rajitha
, p. 477 - 479 (2007/10/03)
Selectfluor is used as an alternative catalyst to conventional catalysts for the synthesis of substituted coumarins via Pechmann condensation of phenols with β-ketoesters under solvent-free conditions at 120 °C. This method of synthesis is simple, cost-effective, requires short reaction time, solvent-free and gives good yields.
Sulphamic acid - An efficient and cost-effective solid acid catalyst for the pechmann reaction
Singh, Pankajkumar R.,Singh, Devendrapratap U.,Samant, Shriniwas D.
, p. 1909 - 1912 (2007/10/03)
Sulphamic acid (H2NSO3H, SA) is used as an alternative to conventional acid catalysts in the Pechmann condensation of phenols with β-ketoester leading to the formation of substituted coumarin. The method is simple, cost-effective, solvent-free and gives good yields in a short reaction time.
Pechmann reaction in chloroaluminate ionic liquid
Khandekar,Khadilkar
, p. 152 - 154 (2007/10/03)
Substituted coumarins were synthesized in good yields via the Pechmann reaction in chloroaluminate ionic liquid. 1-Butylpyridinium chloroaluminate ionic liquid was used as a solvent cum catalyst for this condensation reaction.
