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Effect of different metal triflates on the conversion and selectivity of the reductive etherification of PHDD compared to their corresponding estimated charge densities. Reaction conditions: PHDD (200 mg, 1.28 mmol COOR groups), Ru(acac)3 (1 mol %), Triphos (1.5 mol %), Lewis acid (2.5 mol %), THF (2 mL), T=140 °C, 40 bar H2, t=16 h.
