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.
Intramolecular heterocyclization of N-(pyrimidin-2-yl)imines of methyl trifluoropyruvate
作者:V. B. Sokolov、A. Yu. Aksinenko
DOI:10.1007/s11172-009-0198-9
日期:2009.7
The reactions of N-(pyrimidin-2-yl)imines of methyl trifluoropyruvate with trimethyl phosphite afforded methyl 3-fluoroimidazo[1,2-a]pyrimidin-2-carboxylates, which were transformed into N-substituted methyl 3-aminoimidazo[1,2-a]pyrimidine-2-carboxylates by the reactions with amines.
Phosphite Mediated Heterocyclization of Fluorinated Heteryliminophosphonates and Carboxylates
作者:Yaroslav Y. Khomutnyk、Yuliya V. Rassukana、Petro P. Onys’ko、Anatoly D. Synytsya
DOI:10.1080/10426507.2012.743142
日期:2013.1.1
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.