Claim: Münchnone's first preparation was reported in 1959 by Lawson & Miles while the azomethine ylide reactivity of münchnones was first published by Huisgen et al.
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.