Description

3-Cyclopentene-1-Carboxylicacid,3-Methyl-,Methylester,(S)-(9Ci) is a high-purity, chiral organic ester building block of significant interest in advanced chemical synthesis. This compound matters because its defined stereochemistry and functionalized cyclopentene core make it a valuable intermediate for constructing complex molecules with specific three-dimensional architectures. Pharmaceutical, agrochemical, and specialty chemical R&D teams need it for developing novel active ingredients, catalysts, and functional materials where precise molecular shape is critical for performance.

Application

• Pharmaceutical Intermediate: A key chiral synthon in the research and development of novel active pharmaceutical ingredients (APIs), particularly for central nervous system (CNS) and anti-inflammatory targets.
• Agrochemical Synthesis: Used in the production of advanced, stereoselective pesticides and herbicides where the (S)-enantiomer provides specific biological activity.
• Catalyst & Ligand Development: Serves as a precursor for synthesizing chiral ligands and organocatalysts used in asymmetric synthesis.
• Fine Chemical Manufacturing: Employed in the multistep synthesis of complex fragrances, flavors, and other high-value specialty chemicals.
• Material Science Research: Acts as a monomer or functional modifier in the development of novel polymers with tailored properties.
• Academic & Industrial R&D: A valuable tool for methodological studies in organic chemistry, particularly in cycloaddition and ring-opening reactions.

Basic Information

Item	Details
Product Name	3-Cyclopentene-1-Carboxylicacid,3-Methyl-,Methylester,(S)-(9Ci)
CAS No.	52148-78-4
Molecular Formula	C8H12O2
Molecular Weight	140.18 g/mol
Synonyms	(S)-3-Methyl-3-cyclopentene-1-carboxylic acid methyl ester; Methyl (S)-3-methyl-3-cyclopentene-1-carboxylate; (1S)-3-Methyl-3-cyclopentene-1-carboxylic acid methyl ester; (S)-3-Methylcyclopent-3-ene-1-carboxylic acid methyl ester; (S)-3-Methyl-3-cyclopentenecarboxylic acid methyl ester; (S)-Methyl 3-methyl-3-cyclopentene-1-carboxylate; 3-Cyclopentene-1-carboxylic acid, 3-methyl-, methyl ester, (S)-
EINECS	Contact for details

Quality Control

Our production of 3-Cyclopentene-1-Carboxylicacid,3-Methyl-,Methylester,(S)-(9Ci) adheres to stringent quality management protocols to ensure batch-to-batch consistency and high chemical purity. Each lot is analyzed using advanced chromatographic (GC, HPLC) and spectroscopic (NMR, IR) techniques to confirm identity, chiral purity (enantiomeric excess), and chemical purity. Certificates of Analysis (COA) detailing all specifications are provided and can be tailored to meet specific customer or regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from strong bases and incompatible organic solvents. For long-term storage, consider maintaining the material under an inert atmosphere to preserve stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 97.0%
Enantiomeric Excess (Chiral HPLC)	≥ 98.0% ee
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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