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- W2010396904 abstract "Regioselectively fluoro-, trifluoromethyl- and trifluoromethoxy-substituted 3-methyleneindolines have been prepared using a four-step procedure involving metalation/bromination of fluorinated Boc-protected anilines, N-propargylation of the resulting o-bromoarylcarbamate and reductive radical cyclization of the product with tributyltin hydride/AIBN. 3-Methyleneindolines, as valuable, versatile intermediates, can be transformed into highly functionalized 3-substituted indoles by ene-type reactions using different enophiles. Thus, fluoro-, trifluoromethyl- and trifluoromethoxy-substituted diethyl 2-hydroxy-2-[(1H-indol-3-yl)methyl]malonates, ethyl 2-hydroxy-3-(1H-indol-3-yl)propionates and ethyl 2-hydroxy-3-(1H-indol-3-yl)-2-trifluormethylpropionates were obtained in 77–86% yield by simply heating the corresponding tert-butyl 3-methyleneindoline-1-carboxylate with an equimolar amount of diethyl ketomalonate, ethyl glyoxalate and ethyl 3,3,3-trifluoropyruvate, respectively, at 100 °C, without solvent, for 0.5–4 h." @default.
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- W2010396904 date "2008-02-01" @default.
- W2010396904 modified "2023-10-16" @default.
- W2010396904 title "Nucleus- and side-chain fluorinated 3-substituted indoles by a suitable combination of organometallic and radical chemistry" @default.
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- W2010396904 doi "https://doi.org/10.1016/j.jfluchem.2007.09.003" @default.
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