Cascade fluorofunctionalisation of 2,3-unsubstituted indoles featuring the formation of C-C, C-F and C-O bonds via electrophilic fluorination using N-fluorobenzenesulfonimide is described. The use of an O-nucleophile tethered to the nitrogen of indoles enables the synthesis of polycyclic fluorinated indoline derivatives from simple precursors in 40-63% yields.
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| http://dx.doi.org/10.1039/c3cc46564k | DOI Listing |
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