Abstract
The aldimines derived from (1 S,2 S)-2-amino-1-phenyl-1,3-propanediols as chiral starting materials were used to prepare cis-β-lactams ( 3, 4) via the Staudinger-reaction. High diastereoselectivity was reached only with large silyl protecting groups. The 6 oxazine derivative was obtained when using butyryl chloride as ketene precursor.
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