Description

Cyclopentanecarboxylic Acid, 1-Hydroxy-2-Methyl-5-(1-Methylethenyl)-, Methyl Ester, (1S,2R,5S)- (9Ci) is a high-purity, stereochemically defined chiral intermediate of significant interest in advanced organic synthesis. Its complex, functionalized cyclopentane core makes it a valuable building block for constructing intricate molecular architectures. This compound is primarily sought after by research and development teams in the pharmaceutical and fine chemical industries for the synthesis of novel active ingredients and specialty materials.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the research and development of new active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring complex, stereospecific molecules.
• Asymmetric Synthesis: Utilized as a sophisticated starting material or intermediate in catalytic asymmetric reactions to introduce defined stereocenters.
• Fragrance & Flavor Chemistry: Serves as a precursor for the synthesis of high-value, structurally unique aroma chemicals and flavor compounds.
• Agrochemical Research: Employed in the development of novel, biologically active compounds for crop protection and agricultural science.
• Material Science: Used in the synthesis of specialized monomers or ligands for advanced polymers and functional materials.
• Academic & Process Chemistry: A valuable reagent for methodological studies in organic chemistry and for scaling up synthetic routes in process development.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 1-Hydroxy-2-Methyl-5-(1-Methylethenyl)-, Methyl Ester, (1S,2R,5S)- (9Ci)
CAS No.	619297-09-5
Molecular Formula	C11H18O3
Molecular Weight	198.26 g/mol
Synonyms	(1S,2R,5S)-1-Hydroxy-2-methyl-5-(prop-1-en-2-yl)cyclopentane-1-carboxylic acid methyl ester; (-)-Isopulegol methyl ester (specific isomer); 5-Isopropenyl-2-methylcyclopentanecarboxylic acid methyl ester, (1S,2R,5S)-; Methyl (1S,2R,5S)-1-hydroxy-2-methyl-5-(prop-1-en-2-yl)cyclopentane-1-carboxylate; Chiral cyclopentane carboxylate ester; Menthane-type chiral ester.
EINECS	Contact for details

Quality Control

Our production of this chiral intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high chemical purity. Identity, purity, and stereochemical integrity are confirmed through advanced analytical techniques including HPLC, GC, chiral chromatography, and NMR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment.

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 acids and oxidizing agents. For long-term storage under inert atmosphere, please contact our technical team for specific recommendations.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC/GC)	≥ 97.0%
Chiral Purity (Chiral HPLC)	≥ 98.0% ee (1S,2R,5S)
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.