Facile synthesis of 1,2,4-triazolines via PPh3-triggered reaction of azodicarboxylate with 2-azidoacrylates

A convenient method for the synthesis of 1,2,4-triazolines by triphenylphosphine-triggered reaction of dialkyl azodicarboxylate with 2-azidoacrylates is described. The cascade reaction procedure is general and efficient.

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