Melting points were determined on a digital melting-point apparatus, using standard open capillary method. NMR spectra were recorded in CDCl 3 or DMSO-d 6 on a FT NMR spectrometer (300.1 for 1 H and 75.4 for 13 C or 600.6 for 1 H and 151.0 for 13 C) at 22 °C. The chemical shifts values  are given in parts per million (ppm) downfield relative to TMS, and coupling constants J are in Hertz (Hz). Multiplicity (s=singlet, d=doublet, t=triplet, dd=doublet of doublets, m=multiplet, br=broad). Residual solvent central peaks were measured; CDCl 3  1 H 7.26, 13 C 77.00; DMSO-d 6  1 H 2.50, 13 C 39.43. Infrared spectra were recorded on a FT-IR instrument in KBr pellets or as thin films, and wave number were expressed in cm -1 . The progress of the reaction was monitored by thin layer chromatography on silica gel coated plates (Merck 60F 254 ), and visualization was accomplished with UV light and/or on iodine vapour. Chromatographic purification was performed using silica gel column chromatography (Merck 60, particle size 70-230 mesh). Yields refer to isolated compounds, estimated to be >98% pure as determined by 1 H NMR.Bi(NO 3 ) 3 •5H 2 O, Fe(NO 3 ) 3 •9H 2 O, (NH 4 ) 2 Ce(NO 3 ) 6, substituted phenols, silica gel 60 (70-230 mesh), acetone and other solvents were purchased from commercial suppliers.

Nitrates. -(WASINSKA, M.; KORCZEWSKA, A.; GIURG, M.; SKARZEWSKI*, J.; Synth. Commun. 45 (2015) 1, 143-150, http://dx.