1: 65 percent / rhodium acetate / benzene / 19 h / Heating 2: 46 percent / Et3N / CH2Cl2 / 28 h / Ambient temperature 3: tetrahydrofuran / 120 h / Ambient temperature 4: 1 N NaOH / tetrahydrofuran / 20 h / Ambient temperature 5: benzene-d6 / 90 h / 115 - 120 °C View Scheme

in benzene-d6 T=115 - 120°C; 90 h;

1: 46 percent / Et3N / CH2Cl2 / 28 h / Ambient temperature 2: tetrahydrofuran / 120 h / Ambient temperature 3: 1 N NaOH / tetrahydrofuran / 20 h / Ambient temperature 4: benzene-d6 / 90 h / 115 - 120 °C View Scheme

1: tetrahydrofuran / 120 h / Ambient temperature 2: 1 N NaOH / tetrahydrofuran / 20 h / Ambient temperature 3: benzene-d6 / 90 h / 115 - 120 °C View Scheme

in deuterated toluene 23 h; Ambient temperature; Yield given;