The enantioselective syntheses of (S)-γ-acetylenic γ-aminobutyric acid (GABA)(1) and the (E)-butenynyl analogue (2) by phthalimide displacement of the homochiral prop-2-ynylic alcohols (6) and (11)[generated from the acetals (3) and (9), respectively], are reported.
A. B. Tabor, A. B. Holmes and R. Baker, J. Chem. Soc., Chem. Commun., 1989, 1025 DOI: 10.1039/C39890001025
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