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Dimethylamino‐Pyrazoles and Pyrazolylium Salts
Author(s) -
Gompper Rudolf,
Guggenberger Rainer,
Zentgraf Rolf
Publication year - 1985
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198509841
Subject(s) - antiaromaticity , salt (chemistry) , pyrazole , ring (chemistry) , chemistry , electron , medicinal chemistry , combinatorial chemistry , organic chemistry , aromaticity , physics , molecule , quantum mechanics
The cation in the pyrazolylium salt 1 can be regarded as a novel stable ring system with 4π electrons and thus–formally–as antiaromatic. It was prepared from the corresponding 1‐unsubstituted pyrazole by oxidation with NO ⊕ BF 4 ⊖ .
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