Activated Carbon-Promoted Oxidative Aromatization of Hantzsch 1,4-Dihydropyridines and 1,3,5-Trisubstituted Pyrazolines Using Molecular Oxygen
Natsuki Nakamichi, Yuka Kawashita, Masahiko Hayashi*
*Department of Chemistry, Faculty of Science, Kobe University, Kobe 657-8501, Japan, Email: mhayashikobe-u.ac.jp
N. Nakamichi, Y. Kawashita, M. Hayashi, Synthesis, 2004, 1015-1020.
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In the presence of activated carbon, Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines were aromatized with molecular oxygen to the corresponding pyridines and pyrazoles in excellent yields.
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activated carbon, aromatization, oxygen, oxidations, pyridines, pyrazoles, heterocycles