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- Quinolizinium refers to the heterocyclic cation with the formula C9H8N+. The cation is isoelectronic and nearly isostructural with naphthalene, the difference being the replacement of one of the two carbons at the fusion positions with N+. The parent quinolizine has not been isolated but salts of these aromatic quinolizinium compounds are well known. Several syntheses begin with 2-substituted pyridines and involve N-alkylation and various dehydrogenation reactions. The quinolizinium core is represented in the berberine family of natural products. It is formally derived from the elusive quinolizines by hydrde abstraction. According to X-ray crystallography of the hexafluorophosphate salt, which is colorless, C9H8N+ is planar. (en)
- キノリジン（Quinolizine）は、分子式 C9H8N で表される複素環式化合物である。+1価のキノリジニウムイオン（Quinolizinium ion）として存在し、芳香族性を示す。求電子試薬に対して不活性である一方、求核試薬に対しては活性で、N位で反応が起こり易い。 水素原子が1つ付加された化合物は下記に示す3通りが存在し、互いに互変異性の関係にある。芳香族性はない。
* 9aH-キノリジン
* 2H-キノリジン
* 4H-キノリジン (ja)
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- pyrido[1,2-a]pyridinium (en)
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- 2636 (xsd:nonNegativeInteger)
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- pyrido[1,2-a]pyridinium (en)
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- Quinolizinium refers to the heterocyclic cation with the formula C9H8N+. The cation is isoelectronic and nearly isostructural with naphthalene, the difference being the replacement of one of the two carbons at the fusion positions with N+. The parent quinolizine has not been isolated but salts of these aromatic quinolizinium compounds are well known. Several syntheses begin with 2-substituted pyridines and involve N-alkylation and various dehydrogenation reactions. The quinolizinium core is represented in the berberine family of natural products. It is formally derived from the elusive quinolizines by hydrde abstraction. According to X-ray crystallography of the hexafluorophosphate salt, which is colorless, C9H8N+ is planar. (en)
- キノリジン（Quinolizine）は、分子式 C9H8N で表される複素環式化合物である。+1価のキノリジニウムイオン（Quinolizinium ion）として存在し、芳香族性を示す。求電子試薬に対して不活性である一方、求核試薬に対しては活性で、N位で反応が起こり易い。 水素原子が1つ付加された化合物は下記に示す3通りが存在し、互いに互変異性の関係にある。芳香族性はない。
* 9aH-キノリジン
* 2H-キノリジン
* 4H-キノリジン (ja)
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- キノリジニウム (ja)
- Quinolizinium (en)
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