作者:V.I. Saloutin、Z.E. Skryabina、I.T. Bazyl'、O.N. Chupakhin
DOI:10.1016/s0022-1139(00)80470-4
日期:1993.11
The self-condensation of ethyl pentafluorobenzoylacetate leads to the formation of 3-pentafluorophenyl-1H-isopyrono[2,3-b]-6,7,8,9-tetrafluorochrom in 37% yield. On hydrolysis, this gave 2-pentafluorobenzoylmethyl-5,6,7,8-tetrafluorochromone. Other routes for preparing some new fluorinated chromones have been confirmed via intramolecular cyclization of ethyl pentafluorobenzoylpyruvate and also from the 2-ethoxymethylene pentafluorobenzoylacetic ester.