1: N,N-dimethyl-formamide With bis(trichloromethyl) carbonate in 1,2-dichloro-ethane T=-5 - 25°C; Vilsmeier-Haack reaction; 0.666667 h; 2: N-(2-pyridinyl)-acetamide in 1,2-dichloro-ethane T=65°C; Vilsmeier-Haack reaction; 2 h;

1: CHCl3 2: P2O5 / 210 °C View Scheme

3,4-dihydroxy-1-tert-butylbenzene