AlCl3, aluminium chloride; aluminum isopropoxide in isopropyl alcohol T=65°C; 12 h;

1: hydrogenchloride / ethanol; ethyl acetate / 1 h / 20 °C 2: AlCl3, aluminium chloride; aluminum isopropoxide / isopropyl alcohol / 12 h / 65 °C View Scheme

1: N-ethyl-N,N-diisopropylamine / acetonitrile / 20 °C 2: hydrogenchloride / ethanol; ethyl acetate / 1 h / 20 °C 3: AlCl3, aluminium chloride; aluminum isopropoxide / isopropyl alcohol / 12 h / 65 °C View Scheme

1: AlCl3, aluminium chloride / dichloromethane / 0 - 70 °C 2: copper(ll) bromide / chloroform; ethyl acetate / 4 h / Reflux 3: N-ethyl-N,N-diisopropylamine / acetonitrile / 20 °C 4: hydrogenchloride / ethanol; ethyl acetate / 1 h / 20 °C 5: AlCl3, aluminium chloride; aluminum isopropoxide / isopropyl alcohol / 12 h / 65 °C View Scheme

1: copper(ll) bromide / chloroform; ethyl acetate / 4 h / Reflux 2: N-ethyl-N,N-diisopropylamine / acetonitrile / 20 °C 3: hydrogenchloride / ethanol; ethyl acetate / 1 h / 20 °C 4: AlCl3, aluminium chloride; aluminum isopropoxide / isopropyl alcohol / 12 h / 65 °C View Scheme