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Synthesis of 2‐Arylbenzoxazoles by Hetereogeneous γ‐MnO 2 Catalyzed Redox Reaction of o‐Nitrophenol with Benzyl Alcohols or Benzyl Amines
Author(s) -
Sen Chiranjit,
Sahoo Tapan,
Galani Sunil M,
Panda A. B,
Ghosh Subhash C.
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600450
Subject(s) - catalysis , redox , benzyl alcohol , benzoxazole , chemistry , yield (engineering) , aryl , nitrophenol , organic chemistry , combinatorial chemistry , materials science , alkyl , metallurgy
Hetereogeneous γ‐MnO 2 Catalyzed Redox Reaction of o‐Nitrophenol with Benzyl Alcohols/ benzyl amines for the synthesis of 2‐Arylbenzoxazoles is described here. Surface active Mn +3 species and the surface O − & O 2 − species were found to play an important role in the catalytic activity. Catalyst is easy to prepare, economic and can be reused for several times. The procedure is very simple and general and applicable for wide range of substrates to afford 2‐aryl benzoxazole in good to excellent yield.