Description

Cyclopentylideneacetic Acid Methyl Ester is a versatile and high-purity chemical intermediate essential for advanced organic synthesis. Its unique structure, featuring a reactive exocyclic double bond and ester functionality, makes it a critical building block for creating complex molecular architectures. This compound is particularly valuable for research and development chemists and process engineers in the pharmaceutical and fine chemical industries, where it is used to synthesize novel active ingredients and specialty materials.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of prostaglandin analogs, steroid derivatives, and other bioactive molecules with cyclopentane or cyclopentene ring systems.
• Fine Chemical Synthesis: Serves as a crucial building block for creating complex fragrances, flavors, and advanced organic materials requiring specific stereochemistry.
• Agrochemical Research: Used in the development of novel pesticides and herbicides, where the cyclopentylidene moiety can contribute to unique biological activity.
• Academic & Industrial R&D: Employed in methodological studies, such as Diels-Alder reactions, Michael additions, and catalytic hydrogenations, to explore new synthetic pathways.
• Material Science: A potential monomer or cross-linking agent in the development of specialized polymers with tailored thermal or mechanical properties.

Basic Information

Item	Details
Product Name	Cyclopentylideneacetic Acid Methyl Ester
CAS No.	40203-73-4
Molecular Formula	C9H14O2
Molecular Weight	154.21 g/mol
Synonyms	Methyl 2-Cyclopentylideneacetate; Methyl Cyclopentylideneacetate; 2-Cyclopentylideneacetic Acid Methyl Ester; (Cyclopentylidene)acetic Acid Methyl Ester; Cyclopentylidene-acetic Acid Methyl Ester; Methyl (cyclopentylidene)acetate; 40203-73-4; Acetic acid, cyclopentylidene-, methyl ester
EINECS	Contact for details

Quality Control

Our Cyclopentylideneacetic Acid Methyl Ester is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques, including GC and HPLC, to monitor critical parameters. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

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

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Purity (HPLC)	≥ 98.0%
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.