Table 4. Effect of Solution pH on Phe-II ee (%) for Reaction Mediated by d-Ribose^a.

^aReaction conditions: 0.25 M Phe-I with 0.50 M sugar in H₂O with NaOH concentration and temperature as listed; (35 d). Enantiomeric excess measured using chiral HPLC after derivatization of AM-II.

^bDeionized H₂O employed with no added NaOH.