“…The results are shown in Fig. 3, using different inorganic oxides of general formula MOx (TiO 2 , Al 2 O 3 , ZrO 2 , Fe 2 O 3 ) [29][30][31], also with supported transition metals (M-TiO 2 , M= Fe, Ru, Pd, Pt, Cu, Au; M-Al 2 O 3 , M= Ru, Pd, Au; and M-ZrO 2 , M= Fe, W); [35][36][37][38] bimetallics (SnPt-SiO 2 and CeZrO 2 ); [19] and Pd-charcoal and Pd-Lindlar´s catalyst as commercially-available hydrogenating catalysts [38,39]. Reaction tests were performed with 1 M solutions of 2 under two different reaction conditions: at 50 • C (solvent MeOH) and at 120 • C (solvent o-xylene) for 1-5 h reaction time.…”