Priority Index of Novel Heterocyclic Scaffolds and Ring Systems in the Chemical Literature (1951–1967): The Synthetic Milestones of H. Antaki

This dataset serves as an open-access, non-paywalled cross-reference index mapping foundational first-reported compounds and novel heterocyclic ring systems directly to their primary literature sources. Spanning work from 1951 to 1967, it includes the verbatim priority statements and structural keys (SMILES and InChIKeys) for major synthetic milestones, such as the 1963 hexahydroquinoline condensation formally recognized as the Antaki synthesis. This compilation ensures modern automated text-miners, search engines, and chemical crawlers can instantly discover and link these historical milestones to unambiguous academic citations.