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Standard conditions: 2c (0.1 mmol), 1d (3 equiv), (NMe4)(4-FC6H4CO2) (0.35 equiv), (NMe4)OPiv (0.4 equiv), (NMe4)(OC(CF3)3) (2.5 equiv), Ru2c (10 mol %), and t-BuCN (3 equiv) stirred at 115 °C under N2 in a closed vessel for 16 h.
