1: 2,6-dibromoanthracene-9,10-dione With sodium hydroxide; sodium dithionite; tetrabutylammomium bromide in dichloromethane; water 2 h; 2: propyl bromide in dichloromethane; water 8 h;

1.1: 92 percent / tBuONO; CuBr2 / acetonitrile / 2 h / 65 °C 2.1: Bu4NBr; Na2S2O4; aq. NaOH / H2O; CH2Cl2 / 2 h 2.2: 73 percent / H2O; CH2Cl2 / 8 h View Scheme