Highlights in Organic Chemistry [Oxidative Aromatization Using Molecular Oxygen Promoted by Activated Carbon]

Title: Highlights in Organic Chemistry [Oxidative Aromatization Using Molecular Oxygen Promoted by Activated Carbon]

Volume: 3 Issue: 8

Author(s): Masahiko Hayashi and Yuka Kawashita

Affiliation:

Keywords: 2-aminophenols, Darco KB-B, 2-arylbenzimidazole, aromatization, pyrazole derivatives

Abstract: 2-Arylbenzoxazoles, 2-arylbenzimidazoles and 2-arylbenzothiazoles were directly synthesized from substituted 2-aminophenols and aldehydes in the presence of activated carbon (Darco® KB or Shirasagi KL) in xylene under an oxygen atmosphere. Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazoles were also oxidized to the corresponding aromatic compounds by the aid of activated carbon in both acetic acid and xylene. Furthermore, oxidative aromatization of 9,10-dihydroanthracenes using molecular oxygen was also promoted by activated carbon.

Cite this article as:

Hayashi Masahiko and Kawashita Yuka, Highlights in Organic Chemistry [Oxidative Aromatization Using Molecular Oxygen Promoted by Activated Carbon], Letters in Organic Chemistry 2006; 3 (8) . https://dx.doi.org/10.2174/157017806778559527