Treatment of the methiodides of 4a-methyl-1,2,3,4-tetrahydro-4aH-carbazole, 2-methyl-3H-indole-3-spirocyclopentane, 2-methylbenzothiazole, and 2-methylquinoline with trifluoroacetic anhydride afforded trifluoromethyl ketones. Some reactions of these enaminones with nitrogen-containing nucleophiles are described, attack taking place at the carbon–carbon and the carbon–oxygen double bonds.
A. S. Bailey, J. H. Ellis, J. M. Harvey, A. N. Hilton and J. M. Peach, J. Chem. Soc., Perkin Trans. 1, 1983, 795 DOI: 10.1039/P19830000795
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