[C-]#N.[K+].[C:4](=[O:7])([O-])[O-:5].[NH4+].[NH4+].[F:10][C:11]1[CH:12]=[C:13]([CH:16]=[CH:17][CH:18]=1)[CH:14]=O.Cl.[NH:20]1CC(=O)NC1=O.[OH-].[Na+]>O.CCO>[NH2:20][CH:14]([C:13]1[CH:16]=[CH:17][CH:18]=[C:11]([F:10])[CH:12]=1)[C:4]([OH:5])=[O:7]Potassium cyanide (6.3, 0.1 mol) and ammonium carbonate (15.7 g, 0.2 mol) were dissolved in 50 mL of water (in a well ventilated fume hood). 3-Fluorobenzaldehyde (5.0 g, 0.04 mol) was dissolved in 50 mL of EtOH and added to the reaction. After stirring at reflux under nitrogen atmosphere for 17 hours, the reaction was cooled to 23° C., the pH adjusted to 2.0 by the addition of 5 N HCl and cooled to 5° C. The resulting hydantoin was collected, rinsed with cold water and vacuum dried giving 3.59 of an off-white solid. The hydantoin was hydrolyzed at reflux using 1 N NaOH giving 2-amino-2-(3-fluorophenyl)acetic acid which was esterified via Procedure H in methanol to give the title compound.
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