How is (3S)-3-{[(9H-Fluoren-9-ylmethoxy)carbonyl]amino}-4-methylpentanoic acid (CAS: 266318-79-0) typically synthesized?

This compound is typically synthesized through multistep organic synthesis, involving the coupling of fluorenylmethanol with an amino acid derivative. The process usually requires the use of coupling reagents such as HATU or EDC, and a base like DIPEA. The yield is generally around 70-80%, and the reaction is performed under anhydrous conditions to avoid side reactions.