A novel porphyrazine ligand tailored to homogeneous metal catalyzed transformations

A novel centrosymmetric porphyrazine (Pz) 1 decorated with pyrazino-dibenzo[b,f]azepine units have been prepared via Linstead macrocyclization reaction of a dinitrile precursor. Accordingly, the peripheral azepine nitrogen offers a chemical handle for subsequent functionalizations. Characterization of the metal complexes (MPzs = Metal Porphyrazines) of 1 was accomplished and good catalytic performances were achieved in the Cu(II)- and Co(II)- catalyzed cyclopropanation with ethyl diazoacetate as a test reaction.