Maxis hrms esi qtof spectrometer

All reagents were obtained from commercial sources and used without further purification. Acetonitrile, toluene and N,N-dimethylformamide were distilled from suitable drying agents (CaH₂ or P₂O₅) and stored over MS 4Å. Mass spectra were recorded with a Bruker Maxis HRMS-ESI-qTOF spectrometer (Moscow, Russia) (electrospray ionization mode). NMR data were recorded with Bruker Avance 400/500 spectrometer (Moscow, Russia) (400.13 MHz for ¹H, 100.61 MHz and 125.73 MHz for ¹³C and 376.50 MHz for ¹⁹F) in DMSO-d₆ and were referenced to residual solvent proton peaks (δH = 2.51 ppm) and solvent carbon peaks (δC = 39.52 ppm). NMR and HRMS spectra are in the Supplementary Material.

All commercial reagents and solvents were used without further purification, unless otherwise noted. Analytical thin-layer chromatography was carried out on UV-254 silica gel plates using appropriate eluents. Compounds were visualized with short-wavelength UV light. NMR spectroscopic data were recorded with a Bruker Avance 400 spectrometer (400.13 MHz for ¹H and 100.61 MHz for ¹³C) DMSO-d₆ and were referenced to the residual solvent proton signal (2.51 ppm,) and solvent carbon signal (39.5 ppm). Melting points were determined with a Stuart SMP50 instrument in open capillary tubes. Mass spectra were recorded with a Bruker Maxis HRMS-ESI-qTOF spectrometer (electrospray ionization mode). Electrochemical measurements were performed with the Autolab PGSTAT30 (EcoChemie, The Netherlands) potentiostat/galvanostat.

Known diazocarbonyl compounds 1 
a–n were prepared according to literature procedures,[¹⁰, ¹¹, ¹², ¹³, ¹⁴] other reagents were obtained from commercial sources and used without any additional purification. Solvents were distilled over suitable drying agents. Mass spectra were recorded with a Bruker Maxis HRMS‐ESI‐qTOF spectrometer (electrospray ionization mode). NMR spectroscopic data were recorded with Bruker Avance 400 spectrometer (400.13 MHz for ¹H and 100.61 MHz for ¹³C) in CDCl₃ and were referenced to residual solvent proton peaks (δ_H=7.28) and solvent carbon peaks (δ_C=77.0). Melting points were determined with a Stuart SMP50 instrument in open capillary tubes.