Claim: In 1959, Münchnone's first preparation was reported by Lawson & Miles while the azomethine ylide reactivity of münchnones was first published by Huisgen cycloaddition developer Huisgen and his group.
Evidence: The first preparation of a münchnone derivative was reported in 1959 by Lawson & Miles by cyclodehydration of 2-pyridone-N-acetic acid with acetic anhydride. The azomethine ylide reactivity of münchnones, and their reaction with alkynes in the synthesis of pyrroles, was first published by Huisgen et al. His major achievement was the development of the 1,3-dipolar cycloaddition reaction, also called the Huisgen cycloaddition.