in tetrahydrofuran 1.) 0 deg C, 15 min, 2.) room temperature, 3 h;

1: 82 percent / tetrahydrofuran / 1.) 0 deg C, 15 min, 2.) room temperature, 3 h 2: 93 percent / 9-acetylanthracene / methanol / 2 h / 5 °C / Irradiation 3: 71 percent / n-BuNF / tetrahydrofuran / 4 h / 45 °C View Scheme

1: 82 percent / tetrahydrofuran / 1.) 0 deg C, 15 min, 2.) room temperature, 3 h 2: 81 percent / n-Bu4NF / tetrahydrofuran / 5.5 h / Heating View Scheme