
%0 Journal Article
%A Sevenard, D. V. 
%A Khomutov, O. G. 
%A Kodess, M. I. 
%A Pashkevich, K. I. 
%A Loop, I. 
%A Lork, E. 
%A Röschenthaler, G.-V. 
%T Condensation of 2-Polyfluoroacylcycloalkanones with Aldehydes and Dimethylformamide-Dimethylacetal
%J Australian Journal of Chemistry
%D 2001/08/08
%V 54
%N 3
%P 157-163
%K 
%R https://doi.org/10.1071/CH01027
%U https://www.publish.csiro.au/paper/CH01027 
%X Polyfluorinated 1,3-diketones containing carbocycles react with aldehydes under Lewis-acid catalysis and also with dimethylformamide&#8211;dimetylacetal without catalysis, yielding exclusively (E)-configured condensation products involving the methylene group of the carbocycle. Novel trifluoromethylated chromenes are prepared from 2-trifluoroacetylcycloalkanones and salicylaldehyde. The structures of two new compounds, 2-(E)-benzylidene-6-trifluoroacetylcyclohexanone and 4-trifluoroacetyl-2,3-dihydro-1H-xantene, are confirmed by X-ray structure analysis. 
