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1,7‐Diaza[12]annulene Derivatives? 100‐Year‐Old Pyridinium Salts!
Author(s) -
Christl Manfred
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200704704
Subject(s) - pyridinium , annulene , chemistry , medicinal chemistry , chloride , salt (chemistry) , pyridinium compounds , dinitrophenyl , stereochemistry , organic chemistry , medicine , antibody , immunology
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.