Abstract

The addition reactions of acetylacetone and ethyl acetoacetate with diphenylcarbodiimide and dicyclohexylcarbodiimide in the presence of nickel acetylacetonate afforded N,N"-substituted α,α-dioxoketene aminals. Adducts of acetylacetone with carbodiimides are readily deacetylated with MeONa in MeOH to form acetylketene aminals. Ketene aminals were used for the synthesis of functionalized 1,2,3-triazoles.

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