“…In recent years, diaminomaleonitrile (DAMN) and its derivatives have been applied in the synthesis of many heterocyclic compounds, including imidazoles, pyrazines, pyrimidines, purines, azepines, pyrroles, oxazoles, nucleosides as well as porphyrazine macrocycles [1][2][3][4][5][6][7][8][9][10]. At present, after many years of research, porphyrazines (Pzs) substituted with nitrogen atoms in the β positions or having rings bound to both β,β positions form a distinct class of novel macrocycles (aminoporphyrazines), along with other porphyrazines substituted with sulphur, oxygen, alkyl or aryl residues [11][12][13][14].…”