Z-Cys(Bzl)-OH (N-Z-L-cysteine benzyl ester) is a protected amino acid derivative widely utilized in peptide synthesis. Its molecular formula is C21H25NO4S with CAS number 6980-70-1. The core process involves the selective protection of the thiol group using a benzyl group and the N-terminal with a benzyloxycarbonyl (Z) moiety to prevent side reactions during solid-phase or solution-phase coupling.
This compound requires storage in a cool, dry place under inert atmosphere to prevent oxidation of the free thiol upon deprotection. Personnel must utilize appropriate PPE including gloves and goggles due to potential skin irritation. It is strictly for laboratory research use and not approved for direct clinical administration without further processing.