Description

Cbz-S-Phenyl-L-Cysteine Methyl Ester is a protected amino acid derivative widely used as a key chiral building block in organic synthesis. This compound is essential for the controlled introduction of the S-phenylcysteine moiety into peptide chains and complex molecules. It is primarily utilized by research institutions and pharmaceutical companies engaged in the development of novel therapeutic peptides, peptidomimetics, and other bioactive compounds.

Application

• Pharmaceutical Intermediates: A critical precursor in the synthesis of peptide-based drugs and active pharmaceutical ingredients (APIs).
• Peptide Synthesis: Serves as a protected amino acid component in solid-phase and solution-phase peptide synthesis (SPPS).
• Chemical Research: Used as a chiral synthon in academic and industrial research for exploring new chemical entities and reaction pathways.
• Bioconjugation: Facilitates the site-specific modification of proteins and other biomolecules due to its reactive functional groups.
• Proteomics & Biochemistry: Employed in the study of enzyme mechanisms and the preparation of enzyme inhibitors.
• Material Science: Potential use in the development of specialized polymers and advanced materials with specific chiral properties.

Basic Information

Product Name	Cbz-S-Phenyl-L-Cysteine Methyl Ester
CAS No.	153277-33-9
Molecular Formula	C₁₈H₁₉NO₄S
Molecular Weight	345.41 g/mol
Synonyms	N-Carbobenzoxy-S-phenyl-L-cysteine methyl ester; (R)-Methyl 2-(((benzyloxy)carbonyl)amino)-3-(phenylthio)propanoate; Z-S-Phenyl-L-Cysteine-OMe; N-Cbz-S-phenyl-L-cysteine methyl ester; Nα-Carbobenzyloxy-S-phenyl-L-cysteine methyl ester; L-Cysteine, S-phenyl-, N-[(phenylmethoxy)carbonyl]-, methyl ester; Methyl N-[(benzyloxy)carbonyl]-S-phenyl-L-cysteinate
EINECS	Contact for details

Quality Control

Our Cbz-S-Phenyl-L-Cysteine Methyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and chiral integrity, to ensure it meets the high standards required for pharmaceutical research and development. Certificates of Analysis (COA) with detailed specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 15-25°C. This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider storing under an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥98.0%
Chiral Purity (HPLC)	≥99.0% ee
Loss on Drying	≤0.5%
Residue on Ignition	≤0.1%
Heavy Metals	≤10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.