in acetic acid T=80°C; 2 h;

ammonium chloride; zinc 1.) 60percent aqueous 1,2-dimethoxyethane, 30 min, 30-40 deg C, 2.) room temperature, free acces of air, 7 h; Yield given. Multistep reaction;

1: 1.) KOEt / 1.) ethanol; 2.) 110 deg C, 1.5 h 2: 1.) ammonium chloride, Zn / 1.) 60percent aqueous 1,2-dimethoxyethane, 30 min, 30-40 deg C, 2.) room temperature, free acces of air, 7 h View Scheme

1: 1.) KOEt / 1.) ethanol; 2.) 110 deg C, 1.5 h 2: 1.) ammonium chloride, Zn / 1.) 60percent aqueous 1,2-dimethoxyethane, 30 min, 30-40 deg C, 2.) room temperature, free acces of air, 7 h View Scheme

(i) Py*HCl, (ii) autoxidation; Multistep reaction;