2,6-Difluoroaniline → alpha-cyano-beta-(2,6-difluoroanilino)-N-ethoxycarbonylacrylamide

참여 물질

반응 단계

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.

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