Abstract
Under S-L phase transfer conditions (PTC: TBAB, (-)-N-benzyl quininium chloride and (+)-N-benzyl cinchoninium chloride), the asymmetric induction effects in the Gabriel reaction of potassium phthalimide with both ethyl and bornyl 2-bromocarboxylates were studied and twenty amino acids were synthesized; the enantiomeric excesses of α-amino acids were 1.7–47.4% and an obvious effect of double asymmetric induction was observed.