A simple and eco‐friendly method for the preparation of 1,5‐diaryl‐3‐(arylamino)‐1H‐pyrrol‐2(5H)‐ones via the cyclo‐condensation reaction of aldehydes, amines and ethyl pyruvate in the presence of silica supported ferric chloride (SiO2‐FeCl3) as reusable heterogeneous catalyst is described. The present methodology offers several advantages such as excellent yields, simple procedure and short reaction
Organocatalytic Three-Component Reactions of Pyruvate, Aldehyde and Aniline by Hydrogen-Bonding Catalysts
作者:Xin Li、Hui Deng、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1002/ejoc.200800491
日期:2008.9
Hydrogen-bondingcatalysts have been found to catalyze one-pot three-componentreactions of pyruvate, anilines and aldehydes to afford versatile 3-amino-1,5-dihydro-2H-pyrrol-2-ones in high yields. Both, thioureas and phosphoric acids are viable catalysts for these reactions and have comparable activity. The corresponding chiral thioureas and phosphoric acids have also been used in these three-component
Triethylammonium Hydrogen Sulfate as a Catalyst for the Preparation of 1,5-diaryl-3-(arylamino)-1<i>H</i>-pyrrol-2(5<i>H</i>)-one derivatives
作者:Mohammad Reza Mohammad Shafiee、Batool Hojati Najafabadi、Majid Ghashang
DOI:10.3184/174751911x13191347034936
日期:2011.11
Triethylammoniumhydrogensulfate [Et3NH][HSO4]) has been used as an efficientacidicionicliquidcatalyst for the preparation of 1,5-diaryl-3-(arylamino)-1H-pyrrol-2(5H)-ones at room temperature. The present methodology offers the advantages of good yields, a simple procedure, shorter reaction times and mild condition. The products were purified without resorting to chromatography.