How is 4-Fluoro-N-{[(2-methyl-2-propanyl)oxy]carbonyl}-D-phenylalanine (CAS: 57292-45-2) typically synthesized?

4-Fluoro-N-{[(2-methyl-2-propanyl)oxy]carbonyl}-D-phenylalanine can be synthesized through a multistep process involving acylation, fluoroalkylation, and protection of the amino group. Common methods include using acyl chloride or anhydride, with catalysis by anhydrous alkaline hydroxide. The reaction is typically conducted in a solvent like methanol or ethanol under mild conditions, yielding a product with good selectivity and moderate to high yield.