Abstract
Chiral N-phosphonyl imines attached by 1-naphthyl group were found to react with lithium malonate enolates smoothly to give chiral β-aminomalonates. Good yields and excellent diastereoselectivity were achieved for sixteen examples. The chiral auxiliary can be readily removed by treating with trifluoroacetic acid (TFA) to give free amino malonates. The absolute structure has been unambiguously determined by converting one of the products into an authentic sample.
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