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An improved three-component reaction of cyclohexyl isocyanide is described. The reaction between alkyl isocyanides and dialkyl acetylenedicarboxylates in the presence of carboxylic acid arylidene-hydrazides to afford highly functionalized ketenimines in good yields. The reaction was characterized by mild conditions, high selectivity and tolerance to various functional groups.

chemical science transactions

Synthesis of Ketenimines Derivatives from Reaction between Alkyl Isocyanides and Dialkyl Acetylenedicarboxylates in the Presence of Carboxylic Acid Arylidene-Hydrazides