1,7‐Diaza[12]annulene Derivatives? 100‐Year‐Old Pyridinium Salts!

2007/11/28 by Manfred Christl · 1 citation
Chemistry · #Chemical Reaction Mechanisms #Organic Chemistry Cycloaddition Reactions #Synthesis and Properties of Aromatic Compounds

paper · doi:10.1002/anie.200704704

openalex publication_date 2007/11/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

The 103-year-old reaction of N-(2,4-dinitrophenyl)pyridinium chloride with primary amines was rediscovered by two research groups recently. Since neither authors nor referees knew the pertinent literature, the products were assigned the structure of the diaza[12]annulenes 1, although they are nothing but N-substituted pyridinium salts.

Citations

• One-Pot Synthesis ofN-Substituted Diaza[12]annulenes
• Influence of para substituents on the rate of cyclization of 5-anilino-N-phenyl-2,4-pentadienylidenimine
• [12]Annulene Gemini Surfactants: Structure and Self‐Assembly
• Formation of phenylpyridinium chloride from 5-anilino-N-phenyl-2,4-pentadienylideniminium chloride. Kinetics in basic media

Cited by

• Zincke reaction [wikipedia]

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