Azines (heterocycles)
Azine is the generic term for six-membered, heterocyclic compounds with one to four nitrogen atoms in the ring, such as azine (s), diazines , triazines and tetrazines . Most common names are permitted for azine and the diazines : pyridine , pyridazine , pyrimidine and pyrazine . The azines are heteroaromatic compounds. The azines with their derivatives and hydrogenation products are widespread as natural substances . This is especially true for pyridine and pyrimidine derivatives, which are found in nature as alkaloids , vitamins and nucleic acids . Azines are polar , water-soluble compounds and weak bases , the base strength of which decreases as the number of nitrogen atoms increases.
| Representatives of the heterocyclic azines | ||||||
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| Surname | 1-azine pyridine |
1,2-diazine pyridazine |
1,3-diazine pyrimidine |
1,4-diazine pyrazine |
1,2,3-triazine, 1,2,4-triazine, 1,3,5-triazine triazines |
1,2,3,4-tetrazine, 1,2,4,5-tetrazine, 1,2,3,5-tetrazine tetrazines |
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Phenazine dyes are often incorrectly referred to as azine dyes.
Web links
Individual evidence
- ^ Entry on azines. In: Römpp Online . Georg Thieme Verlag, accessed on November 16, 2013.