Protic ionic liquids with nitrate anions were used as solvents and catalysts for a three-component oxidative dehydrogenation tandem reaction via the coupling and hydroarylation of benzaldehyde, aniline, and phenylacetylene to a quinoline derivative. The reaction was supported by air and microwave irradiation. The presence of nitrate as counter anion in the protic ionic liquids was essential for the reaction.
带有硝酸盐阴离子的质子离子液体被用作溶剂和催化剂,用于苯甲醛、苯胺和苯乙炔的偶联和氢化芳基化三组分氧化脱氢串联反应,生成喹啉衍生物。该反应在空气和微波辐射的支持下进行。质子离子液体中硝酸盐的存在对于反应至关重要。
Piperidinium nitrate was studied by FTIR and FT Raman spectroscopy in the range 100-4000 cm-1 at 300 K. On the basis of DSC measurements which exhibit two effects indicating phase transition at 256 and 295 K, FTIR spectra were recorded down to a temperature of 90 K. Discussion of the phase transition mechanism is based on the observed changes in the FTIR spectra during cooling of the compound.