How is 4-Methyl-N-{[(2-methyl-2-propanyl)oxy]carbonyl}phenylalanine (CAS: 80102-27-8) typically synthesized?

4-Methyl-N-{[(2-methyl-2-propanyl)oxy]carbonyl}phenylalanine (CAS: 80102-27-8) is synthesized through a multi-step process involving peptide coupling, protection of hydroxyl groups, and subsequent deprotection. Commonly, a protected amino acid is coupled with a protected carboxylic acid derivative under mild conditions, followed by deprotection and purification steps. This compound is often synthesized using standard reagents such as HBTU, DIPEA, and TFA.