1: N,N-dimethyl-formamide With trichlorophosphate in acetonitrile T=-5°C; Vilsmeier-Haack Formylation; 1 h; 2: 2',5'-dihydroxy acetophenone in acetonitrile T=20°C; Vilsmeier-Haack Formylation; 12 h; Kinetics; Reagent/catalyst;

1.1: sulfuric acid / 0.17 h / 20 °C 2.1: AlCl3, aluminium chloride / 6 h / 120 °C 2.2: |Cooling 3.1: trichlorophosphate / 0 - 20 °C View Scheme

1.1: AlCl3, aluminium chloride / 6 h / 120 °C 1.2: |Cooling 2.1: trichlorophosphate / 0 - 20 °C View Scheme

sulfuric acid; water 2 h; Heating;