sodium amalgam; Na2HPO4 buffer in tetrahydrofuran; methanol T=-20°C;

1: 78 percent / tetrahydrofuran 2: 92 percent / 6percent sodium amalgam, Na2HPO4 buffer / methanol; tetrahydrofuran / -20 °C View Scheme

1: 93 percent / benzene / 28 h / 120 °C 2: 78 percent / tetrahydrofuran 3: 92 percent / 6percent sodium amalgam, Na2HPO4 buffer / methanol; tetrahydrofuran / -20 °C View Scheme