in toluene refluxing a soln. of Ru complex and ligand in toluene for 24 h; evapn., column chromy. (silica gel, benzene/acetonitrile 9:1 vol.);

in toluene refluxing a soln. of Ru complex and ligand in toluene for 24 h; evapn., column chromy. (silica gel, benzene/acetonitrile 9:1 vol.), column HPLC (silica gel, benzene/acetonitrile 9:1 vol.);

in toluene 12 h; Reflux;

in toluene 12 h; Reflux;