Musil, Zbynek; Zimcik, Petr; Miletin, Miroslav; Kopecky, Kamil; Lenco, Juraj published the article 《Synthesis, separation and UV/Vis spectroscopy of pyrazino-quinoxalinoporphyrazine macrocycles》. Keywords: zinc pyrazino quinoxalino porphyrazine macrocycle complex preparation.They researched the compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile( cas:56413-95-7 ).COA of Formula: C6Cl2N4. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:56413-95-7) here.
Unsym. metal-free and zinc complexes of pyrazino/quinoxalino-porphyrazines (PQP) bearing eight diethylamino groups were synthesized by statistical tetramerization of 2,3-bis(diethylamino)quinoxaline-6,7-dicarbonitrile and 5,6-bis(diethylamino)pyrazine-2,3-dicarbonitrile in lithium butanolate. For this purpose, a new heteroatom-substituted quinoxaline precursor, 2,3-dichloroquinoxaline-6,7-dicarbonitrile, was prepared and characterized. It is a flexible starting material for new building blocks of quinoxaline-6,7-dicarbonitrile derivatives All the PQPs (including adjacent and opposite isomers) from the statistical mixture were detected and separated by column chromatog. on silica and characterized by MALDI-TOF mass spectrometry, IR, UV/visible and NMR spectroscopy. The effect of the insertion of benzene rings into the tetrapyrazinoporphyrazine (TPP) system is discussed. Each benzene ring insertion into the TPP system causes a bathochromic shift of 22 nm; the dependence is linear. The final tetra[6,7]quinoxalinoporphyrazines were red shifted to 744 and 763 nm for the zinc and metal-free derivative, resp. Splitting of the Q-band was observed for PQPs with lower symmetry.
Compound(56413-95-7)COA of Formula: C6Cl2N4 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5,6-Dichloropyrazine-2,3-dicarbonitrile), if you are interested, you can check out my other related articles.
Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate