Description

D-Cysteine, S,2-Dimethyl- (9Ci) is a specialized, non-proteinogenic derivative of the amino acid cysteine, characterized by its D-configuration and S,2-dimethyl substitution. This specific stereochemistry and functionalization make it a valuable chiral building block and intermediate in advanced synthetic chemistry. It is primarily utilized by research institutions and industrial R&D departments focused on pharmaceuticals, agrochemicals, and specialty chemical synthesis. The compound is essential for developing novel compounds where precise stereochemical control and unique sulfur-based reactivity are required.

Application

• Pharmaceutical Intermediate: Serves as a key chiral synthon in the research and development of new active pharmaceutical ingredients (APIs), particularly for drugs targeting neurological and metabolic pathways.
• Agrochemical Research: Used in the synthesis of novel pesticides and herbicides, leveraging its sulfur moiety for bioactivity.
• Peptide Chemistry: Acts as a modified cysteine residue in the synthesis of non-natural peptides and peptidomimetics for biochemical and therapeutic studies.
• Chemical Biology Probes: Employed in the design and synthesis of molecular probes to study enzyme mechanisms and protein interactions.
• Asymmetric Synthesis Catalyst Ligand: Potential use as a precursor for chiral ligands or organocatalysts in stereoselective transformations.
• Reference Standard: Used as an analytical standard in chromatography (HPLC, GC) for method development and quality control in related chemical processes.

Basic Information

Product Name	D-Cysteine, S,2-Dimethyl- (9Ci)
CAS No.	111003-28-2
Molecular Formula	C5H11NO2S
Molecular Weight	149.21 g/mol
Synonyms	D-2-Amino-3-(methylthio)butanoic Acid; (2R)-2-Amino-3-(methylthio)butanoic Acid; D-3-(Methylthio)-2-aminobutanoic Acid; D-α-Amino-β-(methylthio)butyric Acid; D-Homocysteine, S-methyl-; D-Thialysine (related analog); (R)-2-Amino-3-(methylsulfanyl)butanoic acid
EINECS	Contact for details

Quality Control

Our D-Cysteine, S,2-Dimethyl- (9Ci) is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including chiral purity verification by HPLC, to ensure identity, potency, and consistency. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting the results for key parameters such as assay, enantiomeric excess, and related substances. We support compliance with relevant research and development standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). The product is light-sensitive and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Enantiomeric Purity (Chiral 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.