Description

D-Cysteine, 2-Methyl- (9Ci) is a non-proteinogenic, sulfur-containing amino acid derivative characterized by its D-configuration and a methyl group at the 2-position. This specific stereochemistry and substitution make it a valuable chiral building block and intermediate for advanced organic synthesis and pharmaceutical research. It is particularly sought after by research institutions and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for developing novel compounds, including peptide mimetics and enzyme inhibitors.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the research and development of new active pharmaceutical ingredients (APIs), especially in protease inhibitor and antibiotic design.
• Biochemical Research: Used as a substrate or inhibitor in enzymatic studies to investigate metabolic pathways and enzyme mechanisms involving cysteine derivatives.
• Peptide Chemistry: Serves as a modified amino acid residue in the synthesis of non-natural peptides to study structure-activity relationships and enhance metabolic stability.
• Agrochemical Synthesis: An intermediate in the production of specialized herbicides, fungicides, or plant growth regulators that require specific chiral centers.
• Asymmetric Catalysis: Employed as a ligand precursor or chiral auxiliary in metal-catalyzed asymmetric synthesis to induce enantioselectivity.
• Nutritional Science Research: Investigated for its potential role or effects in metabolic studies, given its structural similarity to the essential amino acid L-cysteine.

Basic Information

Product Name	D-Cysteine, 2-Methyl- (9Ci)
CAS No.	239101-34-9
Molecular Formula	C4H9NO2S
Molecular Weight	135.18 g/mol
Synonyms	(2R)-2-Amino-2-methyl-3-sulfanylpropanoic acid; D-2-Methylcysteine; (R)-2-Amino-2-methyl-3-mercaptopropanoic acid; D-α-Methylcysteine; 2-Methyl-D-cysteine; D-Three-2-methylcysteine; (R)-2-Methylcysteine; 239101-34-9
EINECS	Contact for details

Quality Control

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

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% de (D-isomer)
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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