Enantioselective Synthesis of Tetrahydropyrano[3,4‐b]indoles: Palladium(II)‐Catalyzed Aminopalladation/1,4‐Addition Sequence |
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Abstract: | A novel palladium(II)‐catalyzed cyclization of aniline‐tethered alkynyl cyclohexadienones is reported. This reaction offers an atom‐economical and redox‐neutral access to various cyclohexenone‐fused tetrahydropyrano3,4‐b ]indoles with high yield and excellent enantioselectivity. Remarkably, this work represents the first example on a transition‐metal‐catalyzed asymmetric intramolecular aminopalladation/1,4 addition sequence. |
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Keywords: | Alkine Asymmetrische Synthesen Cyclisierungen Heterocyclen Palladium |
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