Description

2-Cyclopentene-1-Carboxylic Acid, 1-Acetyl-, Methyl Ester (9Ci) is a specialized, high-purity chemical intermediate with a unique bicyclic structure that serves as a versatile building block in advanced organic synthesis. Its value lies in enabling the construction of complex molecular architectures, particularly for pharmaceutical and agrochemical research where precise stereochemistry and functional group compatibility are critical. This compound is essential for R&D chemists and process development scientists in the life sciences and fine chemical industries seeking to develop novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of prostaglandin analogs, steroid derivatives, and other bioactive molecules with complex ring systems.
• Agrochemical Research: Used in developing novel herbicides, fungicides, and plant growth regulators that require specific cyclic frameworks.
• Material Science Precursor: Serves as a monomer or cross-linking agent in the development of specialized polymers with tailored thermal and mechanical properties.
• Organic Synthesis Building Block: Employed in Diels-Alder reactions, Michael additions, and other cyclization strategies to create complex natural product analogs and heterocycles.
• Flavor & Fragrance Chemistry: A potential intermediate for synthesizing musk analogs and other macrocyclic odorants due to its ester and ketone functionalities.
• Academic & Industrial R&D: A valuable tool for methodological studies in asymmetric catalysis and new reaction pathway development.

Basic Information

Product Name	2-Cyclopentene-1-Carboxylic Acid, 1-Acetyl-, Methyl Ester (9Ci)
CAS No.	199123-49-4
Molecular Formula	C9H12O3
Molecular Weight	168.19 g/mol
Synonyms	Methyl 1-acetyl-2-cyclopentene-1-carboxylate; 1-Acetyl-2-cyclopentenecarboxylic acid methyl ester; 2-Cyclopentene-1-carboxylic acid, 1-acetyl-, methyl ester; Methyl 1-acetylcyclopent-2-ene-1-carboxylate; 1-Acetyl-1-methoxycarbonylcyclopent-2-ene
EINECS	Contact for details

Quality Control

Our production of 2-Cyclopentene-1-Carboxylic Acid, 1-Acetyl-, Methyl Ester (9Ci) adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity for sensitive synthetic applications. Each lot is fully characterized using advanced analytical techniques including GC, HPLC, NMR, and IR spectroscopy. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with every shipment. We support cGMP-compliant manufacturing for pharmaceutical applications upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. The container should be kept tightly sealed when not in use to prevent moisture absorption and potential degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 97.0% (Area %)
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.