1: With hydrogen bromide; oxygen; anhydrous cobalt diacetate; Manganese (II) acetate; benzoic acid in water T=234.99°C; P=36961.4 Torr; 0.25 - 0.5 h; 2: With hydrogen; 0.5 Pd/C in water T=232.212 - 237.768°C; P=5171.62 Torr; 4 h; Product distribution / selectivity;