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The reactions of certain heteroaromatic substrates with trifluorofluorooxymethane gave CF3O(F) and F(F) adducts. Subsequent reactions with base regenerated the heteroaromatic system substituted by fluoro or trifluoromethoxy Under these conditions methyl 1-acetylindol-3-ylacetate gave 1-acetyl-2-hydroxy-3-methoxycarbonylmethylene-indoline.
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BARTON et al. (1977) studied this question.
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