How is (2S)-2-{[(tert-butoxy)carbonyl]amino}-4-(methylsulfanyl)butanoic acid (CAS: 2488-15-5) typically synthesized?

(2S)-2-{[(tert-butoxy)carbonyl]amino}-4-(methylsulfanyl)butanoic acid is typically synthesized via a multi-step process involving the protection of the amino group with tert-butoxycarbonyl (BOC) followed by the introduction of the sulfide group. The synthesis often requires careful control of reagents and reaction conditions to achieve high yield and selectivity. Commonly, reactions are conducted under mild conditions, and appropriate catalysts and solvents are used to enhance reactivity and control side reactions.