1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole; N,N,N',N'-tetramethyl-1,6-pyrenediamine in N,N-dimethyl-formamide Rearrangement; reduction; 4 h; UV-irradiation;

methanol; samarium diiodide in tetrahydrofuran Ambient temperature;

1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole; N,N,N',N'-tetramethyl-1,6-pyrenediamine in N,N-dimethyl-formamide Rearrangement; reduction; 4 h; UV-irradiation;