Organocatalytic and Highly Stereoselective Direct Vinylogous Mannich Reaction
摘要:
The first direct asymmetric vinylogous Mannich (AVM) reaction of α,α-dicyanoolefins and N-Boc aldimines was described promoted by a simple chiral bifunctional thiourea-tertairy amine organocatalyst. The reaction was highly efficient (S/C up to 1000) and regio-, stereoselective (generally >99% de, 96 to >99.5% ee) at room temperature for a broad array of substrates. Enantiomerically pure δ-amino acid could be smoothly prepared from the adduct.
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DOI:
10.1021/ja068703p
被引量:
年份:
2007
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