The 1,3-dipolar cycloadditions of a series of chiral acrylates and acrylamides with 2-tert-butoxycarbonyl-1-pyrroline N-oxide were studied. The synthesis of enantiopure tert-butyl (2R,7aR)- and (2S,7aS)-2-hydroxy- 3-oxo-tetrahydro-1H-pyrrolizine-7a(5H)-carboxylates starting from the acryloyloxazolidinone derived from (S)-phenylalanine is reported.
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Brandi et al. (2006) studied this question.
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