Further assessment of the performances of the best catalytic system obtained so far was undertaken, i.e., MeCN/15 bar, starting with the effect of temperature (Table ). A higher temperature increased the activity of the catalytic system: 83% of SA was obtained after only 1 h at 110 °C (Table , entry 4), but after 3 h, the PL was entirely converted, while the yield stagnated at 87% (Table , entry 3). The decrease of the selectivity was even more exacerbated at 130 °C, to the point where the yield of SA reached barely 44% after 1 h (Table , entry 6), and 54% after 3 h (Table , entry 7).