Abstract
Treatment of readily available chiral building block 1 with (2 R)-2,3- O-isopropylideneglyceraldehyde ( 5) provides a new route for asymmetric synthesis of 2,4-disubstituted pyrrolidines. Several proline-amino acid chimeras: proline-leucine, proline-lysine, proline-arginine and proline-glutamic acid, are synthesized in highly diastereomerically pure forms.
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