Phosphite Mediated Heterocyclization of Fluorinated Heteryliminophosphonates and Carboxylates
摘要:
Phosphite-induced heterocyclization of (N-heterylimino)-trifluoroethyl phosphonates and carboxylates leads to novel fused imidazoles of biological relevance, bearing fluorine atom and phosphonyl or carboxyl function in neighboring positions of imidazole ring.
Synthesis of 3-fluoroimidazo[1,2-a]pyrimidines and 5-fluoroimidazo[2,1-b][1,3]thiazoles was accomplished via triethyl phosphite-induced heterocyclization of the corresponding N-(heteroarylimino)tri-fluoropyruvates. This method provides a convenient approach to synthesize ring-fluorinated fused imidazoles of biological relevance. (C) 2010 Elsevier B.V. All rights reserved.