Annulated N-heterocyclic carbenes: 1,3-Ditolylphenanthreno[9,10-d]imidazol- 2-ylidene and transition metal complexes thereof

Article abstract of DOI:10.1021/om9000132

The N, N'-bis(tolylamino)phenanthrenes 1a and 1b were synthesized by reductive cyclization of benzil- bis(tolylimines) and cyclized with triethyl orthoformate in the presence of NH4PF6 to give the corresponding bis(tolyl)phenanthreno[9,10-d]imidazolium he