How is (2S)-2-{[(9H-Fluoren-9-ylmethoxy)carbonyl]amino}-4-(methylselanyl)butanoic acid (CAS: 1217852-49-7) typically synthesized?

(2S)-2-{[(9H-Fluoren-9-ylmethoxy)carbonyl]amino}-4-(methylselanyl)butanoic acid can be synthesized via a multi-step process involving protection of the amino group with fluorenylmethoxy carbonyl, followed by the introduction of the methylselanyl group. This synthesis typically involves the use of Boc-protected amino acids and methyl selenol as the selenol source. The yield and selectivity of the product can be optimized through careful control of reaction conditions and the use of appropriate solvents and catalysts.