Description

Cyclopentanecarboxylic Acid, 2-Methyl-5-(1-Methylethylidene)-, Ethyl Ester, (2R)- (9Ci) is a high-purity, chiral chemical intermediate of significant interest in advanced organic synthesis. Its defined stereochemistry and functionalized cyclopentane core make it a valuable building block for creating complex, optically active molecules. This compound is primarily utilized by research and development chemists in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the research and development of novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring stereochemical precision.
• Agrochemical Synthesis: Used in the development of advanced pesticides and herbicides where specific stereoisomers exhibit enhanced biological activity.
• Flavor & Fragrance Ingredient: Serves as a precursor in the synthesis of complex aroma chemicals and specialty flavors due to its unique structural motif.
• Material Science Research: Investigated as a monomer or building block for novel polymers and advanced materials with specific optical or mechanical properties.
• Catalyst & Ligand Development: Employed in the design and synthesis of new chiral catalysts and ligands for asymmetric synthesis.
• Academic & Industrial R&D: A valuable tool for methodological studies in organic chemistry and process development for scale-up.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 2-Methyl-5-(1-Methylethylidene)-, Ethyl Ester, (2R)- (9Ci)
CAS No.	623935-92-2
Molecular Formula	C12H20O2
Molecular Weight	196.29 g/mol
Synonyms	(2R)-2-Methyl-5-(1-methylethylidene)cyclopentanecarboxylic acid ethyl ester; Ethyl (2R)-2-methyl-5-(prop-1-en-2-yl)cyclopentane-1-carboxylate; (R)-2-Methyl-5-isopropylidenecyclopentanecarboxylic acid ethyl ester; (2R)-2-Methyl-5-(prop-1-en-2-yl)cyclopentane-1-carboxylic acid ethyl ester; (R)-Ethyl 2-methyl-5-(prop-1-en-2-yl)cyclopentane-1-carboxylate; (R)-Ethyl 2-methyl-5-isopropylidenecyclopentanecarboxylate; (2R)-2-Methyl-5-(1-methylethylidene)cyclopentanecarboxylic acid ethyl ester (9CI)
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 2-Methyl-5-(1-Methylethylidene)-, Ethyl Ester, (2R)- (9Ci) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chiral purity analysis by HPLC, to ensure high chemical and enantiomeric purity suitable for demanding synthetic applications. Certificates of Analysis (COA) with detailed specifications are provided for every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents. For long-term storage, consider an inert atmosphere to preserve optimal quality.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Chiral Purity (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.