A water-accelerated multicomponent synthesis of organic target molecules has been used as a key method for
the preparation of cyclopentadiene derivatives. The three-component condensation reactions of primary amines with alkyl
propiolates in the presence of triphenylphosphine in water at 80 °C are developed as efficient and clean green synthetic
procedures for the high-yielding preparation of 4-oxo-2,5-cyclopentadiene-1,2-dicarboxylate derivatives.
Keywords: Cyclopentadiene, primary amines, triphenylphosphine, alkyl propiolates, multi-component reaction.
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