Easy Electrochemical Synthesis of 2-amino-4-aryl-3-cyano-5-ethoxycarbonyl- 6-methyl-4H-pyrans in the Absence of Supporting Electrolyte

An easy electrochemical synthesis of 2-amino-4-aryl-3-cyano-5-ethoxycarbonyl-6-methyl-4H-pyrans has been set up, by galvanostatic electrolysis of a mixture of arylidenemalononitrile and ethyl acetoacetate in the absence of supporting electrolyte. Very high yields are obtained by a particularly simple procedure.