Description

3-Cyclopentene-1-Carboxylic Acid, 2-Methyl-5-Oxo-, Methyl Ester (9Ci) is a specialized organic ester building block featuring a cyclopentene ring with both ketone and ester functionalities. This unique molecular architecture makes it a valuable intermediate for synthesizing complex molecules in advanced research and development. It is primarily sought after by pharmaceutical, agrochemical, and fine chemical industries for use in creating novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the research and development of new drug candidates, particularly in the synthesis of prostaglandin analogs and other bioactive molecules.
• Agrochemical Synthesis: Serves as a precursor in the production of advanced pesticides and herbicides, leveraging its reactive functional groups for structural diversification.
• Fine Chemical Production: Used in the manufacture of specialty chemicals, including fragrances, flavors, and performance materials requiring specific cyclic structures.
• Academic & Industrial R&D: A critical reagent in organic synthesis laboratories for methodological studies, catalysis research, and exploring new chemical spaces.
• Material Science Precursor: Potential use in the synthesis of monomers for specialty polymers or advanced organic frameworks with tailored properties.

Basic Information

Product Name	3-Cyclopentene-1-Carboxylic Acid, 2-Methyl-5-Oxo-, Methyl Ester (9Ci)
CAS No.	623531-38-4
Molecular Formula	C9H12O3
Molecular Weight	168.19 g/mol
Synonyms	Methyl 2-Methyl-5-oxo-3-cyclopentene-1-carboxylate; 2-Methyl-5-oxo-3-cyclopentene-1-carboxylic acid methyl ester; 3-Cyclopentene-1-carboxylic acid, 2-methyl-5-oxo-, methyl ester; Methyl 2-methyl-5-oxocyclopent-3-ene-1-carboxylate
EINECS	Contact for details

Quality Control

Our 3-Cyclopentene-1-Carboxylic Acid, 2-Methyl-5-Oxo-, Methyl Ester (9Ci) is produced under strict quality management protocols. Each batch is analyzed to ensure high chemical purity and consistency, meeting the stringent requirements of research and industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (typically 15-25°C). Keep away from heat sources and incompatible materials. For long-term storage, consider an inert atmosphere to preserve stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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