Enantioselective vinylogous Michael addition of β,γ-unsaturated butenolide to 2-iminochromenes
An efficient organocatalyzed asymmetric synthesis of 2-amino-4H-(2-furanone)-3-carbonitrile via vinylogous Michael addition of non-activated β,γ-unsaturated butenolide to 2-iminochromenes has been realized.
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