How is S-(4-Methylbenzyl)-N-{[(2-methyl-2-propanyl)oxy]carbonyl}-L-cysteine (CAS: 61925-77-7) typically synthesized?

S-(4-Methylbenzyl)-N-{[(2-methyl-2-propanyl)oxy]carbonyl}-L-cysteine can be synthesized through a multi-step process involving the protection of cysteine, followed by alkylation with 4-methylbenzyl chloride, and subsequent deprotection. Common catalysts include triethylamine, and the reaction is typically carried out in anhydrous conditions to maximize yield and selectivity. This process requires careful control of reaction conditions to achieve the desired product.