propionic acid T=140°C; 5 h;

1.1: iodine; H2SO4 / 2 h / 20 °C 1.2: bromine; H2SO4 / 18 h / 80 °C 2.1: 46 g / acetic acid / 1-methyl-pyrrolidin-2-one / 120 h / 120 °C View Scheme

1: perylene-3,4,9,10-tetracarboxylic dianhydride With sulfuric acid; iodine T=20°C; 2 h; Inert atmosphere; 2: With bromine T=80°C; 18 h; 3: 2,6-bis(1-methylethyl)benzenamine With acetic acid in 1-methyl-pyrrolidin-2-one T=120°C; 96 h;

1: perylene-3,4,9,10-tetracarboxylic dianhydride With bromine 2: 2,6-bis(1-methylethyl)benzenamine With propionic acid T=155°C; 22 h;

1: perylene-3,4,9,10-tetracarboxylic dianhydride With sulfuric acid T=20°C; 12 h; 2: With iodine T=20 - 85°C; 0.5 h; 3: 2,6-bis(1-methylethyl)benzenamine Further stages;