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Indole derivativesR 0140 N-Heterocyclic Carbene-Catalyzed Cross-Coupling of Aldehydes with Arylsulfo-

nyl Indoles. — The umpolung reaction gives rise to a wide scope of α-(3-indolyl)ke-tones. Substituents at the indole core have little influence on the yields except an alkyl moiety [cf.(IVc)] or N-substitution [cf.(VIb)]. Using a chiral catalyst, an enantioselec-tive version is possible [cf. (IIIa,c)]. — (LI, Y.; SHI, F.-Q.; HE, Q.-L.; YOU*, S.-L.; Org. Lett. 11 (2009) 15, 3182-3185; State Key Lab. Organomet. Chem., Shanghai Inst. Org. Chem., Chin. Acad. Sci., Shanghai 200032, Peop. Rep. China; Eng.) — R. Simon

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