Description

D-Cysteine, 2-Methyl-, Ethyl Ester (9Ci) is a specialized, non-proteinogenic amino acid derivative characterized by its D-configuration and ethyl ester functional group. This compound is valued for its role as a chiral building block and intermediate in advanced organic synthesis, particularly for introducing specific stereochemistry and functional handles into target molecules. It is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and fine chemical industries developing novel active ingredients, peptides, and complex organic compounds.

Application

• Pharmaceutical Intermediate: Serves as a key chiral synthon in the research and development of new active pharmaceutical ingredients (APIs), especially for drugs targeting neurological and metabolic pathways.
• Peptide Chemistry: Used in the synthesis of modified peptides and peptidomimetics where the D-configuration and methyl substitution can enhance metabolic stability and biological activity.
• Agrochemical Synthesis: Acts as a precursor in the creation of chiral herbicides, fungicides, and plant growth regulators that require specific stereochemistry for efficacy.
• Fine Chemical Production: Employed as a building block for synthesizing complex organic molecules, flavors, fragrances, and specialty chemicals.
• Biochemical Research: Utilized as a substrate or inhibitor in enzymatic studies and metabolic research to investigate cysteine-related pathways.
• Material Science: Potential application in the development of chiral ligands for catalysis or in the surface functionalization of nanomaterials.

Basic Information

Product Name	D-Cysteine, 2-Methyl-, Ethyl Ester (9Ci)
CAS No.	710941-52-9
Molecular Formula	C6H13NO2S
Molecular Weight	163.24 g/mol
Synonyms	Ethyl (2R)-2-amino-3-mercapto-2-methylpropanoate; D-2-Methylcysteine ethyl ester; (R)-2-Amino-3-mercapto-2-methylpropanoic acid ethyl ester; 2-Methyl-D-cysteine ethyl ester; Ethyl D-2-methylcysteinate; D-α-Methylcysteine ethyl ester; (R)-2-Methylcysteine ethyl ester; NSC 760463
EINECS	Contact for details

Quality Control

Our D-Cysteine, 2-Methyl-, Ethyl Ester (9Ci) is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity assessment by HPLC, to ensure it meets the high standards required for research and synthesis. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at 2-8°C to minimize oxidation and degradation. Keep the container in a cool, dry, well-ventilated place, away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% de
Water Content (KF)	≤ 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.