How is 4-Methyl-N-{[(2-methyl-2-propanyl)oxy]carbonyl}-L-phenylalanine (CAS: 80102-26-7) typically synthesized?

4-Methyl-N-{[(2-methyl-2-propanyl)oxy]carbonyl}-L-phenylalanine can be synthesized via a multi-step process involving the protection of the carboxylic acid, functional group manipulation, and subsequent deprotection. Common methods include using di-tert-butyl dicarbonate for protection and TFA for deprotection. This compound is often synthesized using standard reaction conditions, such as refluxing in anhydrous methanol with a suitable catalyst, followed by purification using column chromatography or recrystallization.