C. Cativiela et al., STEREOSELECTIVE AMINATION OF CHIRAL ENOLATES - SYNTHESIS OF CHIRAL KEY INTERMEDIATES FOR BETA-LACTAM ANTIBIOTICS, Tetrahedron : asymmetry, 5(8), 1994, pp. 1465-1468
Stereoselective enolate trapping of lithium hexylsulfamoylisobornyl-2-
cyano-3-phenylpropanoate with O-(diphenylphosphinyl) hydroxylamine fol
lowed by appropriate reduction, hydrolysis, and cyclisation processes
allows the asymmetric synthesis of (S)-3-amino-3-benzyl-2-azetidinone.