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
Uncatalyzed synthesis of 3-amino-1,5-dihydro-2H-pyrrol-2-ones
作者:Hamid Reza Shaterian、Mohammad Ranjbar
DOI:10.1007/s11164-013-1102-7
日期:2014.5
Uncatalyzed one-pot pseudo-four-component reaction of ethyl pyruvate, anilines, and aldehydes in n-hexane as solvent, under reflux, affords a variety of 3-amino-1,5-dihydro-2H-pyrrol-2-ones in high yield. n-Hexane is an excellent driving force in preparation of the desired products. These compounds have biological and pharmacological properties and are also used in medicinal chemistry. Use of a non-toxic and inexpensive solvent, simple and efficient synthesis, clean work-up, and high yields of the products are the advantages of this method. We report the first catalyst-free method for synthesis this class of compounds.
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.