1: N,N-dimethyl-formamide With bis(trichloromethyl) carbonate in 1,2-dichloro-ethane T=0 - 20°C; 2: 2-hydroxy-5-nitro-acetophenone in 1,2-dichloro-ethane T=0 - 20°C; 6.5 h; Further stages.;

1: N,N-dimethyl-formamide With bis(trichloromethyl) carbonate in 1,2-dichloro-ethane T=0 - 20°C; 2: 2-hydroxy-5-nitro-acetophenone in 1,2-dichloro-ethane T=0 - 20°C; 6.5 h; Further stages.;

1: pyridine / dichloromethane 2: AlCl3, aluminium chloride / 120 °C 3: oxalyl dichloride / 0 - 20 °C View Scheme

1: AlCl3, aluminium chloride / 120 °C 2: oxalyl dichloride / 0 - 20 °C View Scheme