Synthesis of some fluorinated nitrogen heterocycles from (diethylaminomethylene)hexafluoroacetylacetone (DAMFA)
作者:Mustapha Soufyane、Catherine Mirand、Jean Lévy
DOI:10.1016/s0040-4039(00)61552-6
日期:1993.11
Simple and highly efficient syntheses of the title compounds from DAMFA are described in the quinoline, azepinonaphtalene, azaphenanthrene(s), pyridopyridine, pyrazole, pyrrole and pyrimidine series.
and general method for the synthesis of 3-trifluoromethyl-4‑trifluoroacetyl pyrazoles from the cycloaddition of sydnones with 1,1,1,5,5,5-hexafluoropentane-2,4-dione has been established. Using ZnI2/bpy as a catalyst in THF, this protocol proved to be general to prepare a variety of 3-trifluoromethyl-4‑trifluoroacetyl pyrazoles in good yields. Utility of this method was demonstrated by further transformations