potassium acetate in hydrogenchloride; acetic anhydride

bromine; sodium ethanolate in ethanol; acetic acid

2-(perfluorophenyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyridin-2-ium tetrafluoroborate; 1,2-diphenylethane (bibenzyl); N-ethyl-N,N-diisopropylamine in dichloromethane T=70°C; Benzoin Condensation; 2 h; Inert atmosphereSealed tube; chemoselective reaction;

2-picoline und Erhitzen des Reaktionsprodukts mit wss.Salzsaeure;