sodium acetate in acetic acid; N,N-dimethyl-formamide 0.5 h;

1: 4-methyl-benzoic acid With 1,1'-carbonyldiimidazole in tetrahydrofuran T=20°C; 0.166667 h; 2: 4-amino-phenol in tetrahydrofuran Heating; Further stages.;

triethylamine in dichloromethane