反应详情

To 10.0 g of α-cyano-β-ethoxy-N-ethoxycarbonylacrylamide dissolved in about 40 ml of hot ethanol is added 6.45 g of 2,6-difluoroaniline in 15 ml of ethanol. The reaction mixture is stirred at reflux for about 6 hours, cooled and filtered to yield α-cyano-β-(2,6-difluoroanilino)-N-ethoxycarbonylacrylamide, white solid (12.61 g), which is added to 60 ml of tetralin and heated at reflux for 5 hours. The mixture is allowed to cool, filtered and washed with ether to yield 10.21 g of 5-cyano-1-(2,6-difluorophenyl)uracil, white solid.

1. temperatureat reflux for about 6 hours
2. temperaturecooled
3. filtrationfiltered