1-methyl-1H-imidazole; [2,2']bipyridinyl; 2,2,6,6-tetramethyl-piperidine-N-oxyl; copper(II) bis(trifluoromethanesulfonate); 1,8-diazabicyclo[5.4.0]undec-7-ene in acetonitrile T=60°C; 24 h; Molecular sieve;

1-methyl-1H-imidazole; [2,2']bipyridinyl; 2,2,6,6-tetramethyl-piperidine-N-oxyl; copper(II) bis(trifluoromethanesulfonate); 1,8-diazabicyclo[5.4.0]undec-7-ene in acetonitrile T=60°C; 24 h; Molecular sieve;