The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Syntheses and characterization of push-pull tetrapyrazino[2,3-b]indoloporphyrazines》. Authors are Jaung, Jae-Yun; Matsuoka, Masaru; Fukunishi, Koushi.The article about the compound:5,6-Dichloropyrazine-2,3-dicarbonitrilecas:56413-95-7,SMILESS:N#CC1=NC(Cl)=C(Cl)N=C1C#N).Application In Synthesis of 5,6-Dichloropyrazine-2,3-dicarbonitrile. Through the article, more information about this compound (cas:56413-95-7) is conveyed.
The synthesis of tetrakis(indolopyrazino)porphyrazines by ring-closure reactions of 2,3-dichloro-5,6-dicyanopyrazine with enamines is described. Alkylated tetrakis(indolopyrazino)porphyrazines have push-pull intramol. charge-transfer chromophoric systems and show good solubility in most organic solvents. Large spectral changes caused by mol. aggregation of these dyes affected by solvent polarity and temperature were studied.
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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