1 H NMR spectra were acquired using Bruker Avance III™ HD 600 MHz apparatus (Billerica, Massachusetts, USA) or Varian VNMR-S 400 MHz spectrometer (Palo Alto, USA) with TMS as the internal standard, using DMSO-d6 as a solvent. 13 C NMR spectra were obtained with the same instruments at 150 MHz or 100 MHz, respectively. FT-IR spectra were recorded on IFS 66v/S spectrometer (Bruker Optics, Ettlinger, Germany). collected by using an EasyMax 102 semi-automated system (Mettler Toledo, USA) connected to a ReactIR ® 15 (Mettler Toledo, USA) probe equipped with an MCT detector and 9.5 mm AgX probe with a diamond tip. The data were The data were sampled from 4000 to 400 cm -1 and visualized using Spectragryph 1.2.13 software (IFS 66v/S spectrometer) or from 3000 to 650 cm -1 and processed by iCIR 4.3 software (ReactIR ® 15). The water content in all obtained products was measured with a TitroLine 7500 KF coulometer (SI Analytics, Germany) using the Karl Fischer titration method according to the previously described procedure . Differential scanning calorimeter (DSC) was performed on DSC-XP-10 unit . Samples between 5 and 20 mg were placed in platinum pans and were heated from 25 to 120 °C at a heating rate of 10 °C min -1 and cooled at a cooling rate of 10 °C min -1 to -80 °C. After that, samples were heated again to 120 °C and subsequently cooled to 25 °C. Thermogravimetric analysis (TGA) for selected compounds was performed using Setsys 1200 apparatus . Samples between 5 and 20 mg were placed in pans and were heated from 25 to 1000 °C at a heating rate of 10 °C min -1 under nitrogen atmosphere.