Synthesis of chiral [2,3]-fused indolines through enantioselective dearomatization inverse-electron-demand Diels-Alder reaction/oxidation of indoles with 2-(2-nitrovinyl)-1,4-benzoquinone.

Enantioselective dearomatization inverse-electron-demand Diels-Alder reaction/oxidation of indoles with 2-(2-nitrovinyl)-1,4-benzoquinone was realised using a chiral bisoxazoline/zinc complex as a catalyst. This transformation allowed for the synthesis of enantioenriched six-membered [2,3]-fused indolines (up to 99% yield and 88% ee).

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