Note that the time course data had separate signals for 4fluorobenzoyl azide formation that was not reflected in 19 F NMR in the literature. The addition of compound 12 was delayed to 31 hours after an observed plateau of nitrene consumption. The carbamate formation after Curtius rearrangement was not observed with online-HPLC, but then characterized by 19 F NMR spectroscopy with sampling before and after the addition of hexafluoroisopropanol (HFIPA) (ESI † Fig. ). The complete prompt and response generated by GPT-4 are in ESI † Table .