1: 3,4-dihydroxy-benzaldehyde With N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C; 0.166667 h; Inert atmosphere; 2: chloromethyl-ethyl-ether in dichloromethane T=20°C; 20 h; Inert atmosphere;

hydrogenchloride; potassium hydroxide 1) EtOH, 48 h, room temp.; Yield given. Multistep reaction;