pyridine; N,N,N',N,-tetramethylethylenediamine; oxygen; copper(l) chloride in N,N-dimethyl-formamide T=20°C;

Cu2(OH)3OAc*H2O in acetonitrile T=100°C; 0.166667 h; Microwave irradiation;

1: potassium carbonate / N,N-dimethyl-formamide / 20 °C / Inert atmosphere 2: pyridine; N,N,N',N,-tetramethylethylenediamine; oxygen; copper(l) chloride / N,N-dimethyl-formamide / 20 °C / Inert atmosphere View Scheme

CuCl2*2H2O 3 h; Ambient temperature;