Abstract
Chiral g-lactones are prevalent organic architectures found in a large array of natural products. In this work, we disclose the development of a modified catalytic system utilizing a commercially available Cu-phosphite catalyst for the diastereoselective reductive coupling of chiral allenamides and ketones to afford chiral -lactone precursors in 80:20 to 99:1 dr.
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Supplementary material

Characterization data
Spectral data are provided for new compounds.