Optically active 2-aryl substituted oxetanes are synthesised in high enantiomeric excesses (up to 89% e.e.)via enantioselective reduction of β-halogenoketones with lithium borohydride using (R,R′)-N,N′-dibenzoylcystine and t-butyl alcohol as ligands.
K. Soai, S. Niwa, T. Yamanoi, H. Hikima and M. Ishizaki, J. Chem. Soc., Chem. Commun., 1986, 1018 DOI: 10.1039/C39860001018
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