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(4S)-tert-Butyl 2,2-dioxo-3-PhF-1,2,3-oxathiazainane-4-carboxylate reacted effectively with nitrogen, sulfur, and oxygen nucleophiles to provide enantiopure (>97% ee) gamma-substituted alpha-amino acids. Reaction: see text.
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Atfani et al. (2001) studied this question.
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