sodium hydroxide; tetrabutyl-ammonium chloride in benzene 6 h; in the presence of air;

1: 90 percent / H2O; CH2Cl2 / 2 h 2: tetrabutylammonium chloride, 50percent sodium hydroxide, / benzene / 6 h / in the presence of air View Scheme

hydrogen; palladium on activated charcoal in methanol T=20°C; P=760 Torr; 1 h;