Unexpected behavior of imines derived from trifluoromethylaryl ketones under basic conditions: Convenient synthesis of 2-arylbenzimidazoles and 2-arylbenzoxazoles
摘要:
Imines derived form trifluoromethylaryl ketones, ortho-phenylenediamines or ortho-aminophenols undergo intramolecular cyclization with the elimination of the CF3 group under a variety of basic conditions to afford 2-arylbenzimidazoles and 2-aryloxazoles in good to excellent yields. (C) 1999 Elsevier Science Ltd. All rights reserved.