Organic Letters · 2014 · 34 citations · 58 references
Natural SciencesChemistryOrganic ChemistryAddition ReactionsHeterocycle SynthesisHeterocyclic ChemistryOrganic SynthesisAsymmetric Heterocycle SynthesisEnantioselective Synthesis
Enantioenriched Al-, Mg-, and Zn-enolates undergo electrophilic trapping by nitroolefins and vinylsulfones to afford 1,4-diketones and 2-(bis(phenylsulfonyl)ethyl)ketones in good yield and excellent diastereoselectivity. A one-pot preparation of indenes and enantiopure syntheses of tetrahydrobenzofurans, tetrahydrobenzopyrroles, and azulenes are disclosed. A site-selective two-step sequence of three conjugate additions is also demonstrated.
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