1: N,N-dimethyl-formamide With trichlorophosphate T=-10°C; 0.166667 h; 2: 1-(2-bromo-4-methyl-phenyl)-1H-pyrrole in 1,2-dichloro-ethane T=100°C; 3 h; Further stages.;

1.1: 80 percent / acetic acid / 1,2-dichloro-ethane; H2O / 80 °C 2.1: phosphorus oxychloride / 0.17 h / -10 °C 2.2: 63 percent / 1,2-dichloro-ethane / 3 h / 100 °C View Scheme