NMR, IR, and HRMS data related to the synthesis of nitrogenated aromatics from 2-pyrones

All compounds were prepared following iodine-catalyzed cascade reactions starting from 2-pyrones and suitable nitrogen sources, as described in the associated study.

The spectroscopic data were collected using standard analytical techniques, including nuclear magnetic resonance (NMR), high-resolution mass spectrometry (HRMS), and infrared spectroscopy (IR). The dataset consists of unprocessed (raw) spectra files, providing full experimental evidence of compound identity and purity. These data are intended to ensure transparency, reproducibility, and validation of the reported results, and may be used for comparison, reanalysis, or further methodological development by other researchers.