T=150°C;

tin(IV) chloride in ethyl acetate 3 h; Ambient temperature;

1: in ethanol 12 h; Heating; 2: With hydrogenchloride in water 3 h;

1: tris-(dibenzylideneacetone)dipalladium(0); 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; sodium t-butanolate / toluene / 95 °C / |Schlenk technique; |Inert atmosphere 2: hydrogenchloride / water; acetic acid / 10 h / 100 °C View Scheme

hydrogenchloride in diethyl ether; acetone 15 h;