Description

Ethyl Cyclopentylideneacetate is a versatile organic ester building block characterized by its cyclopentylidene moiety. This compound matters as a key intermediate in fine chemical synthesis, offering a reactive alkene handle for cycloaddition and functionalization reactions. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and fragrance industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: Serves as a crucial synthon in the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates, particularly those requiring cyclopentane or spirocyclic ring systems.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and plant growth regulators where the cyclopentylidene group imparts specific biological activity.
• Flavor & Fragrance Ingredient: Acts as a precursor for musky, amber, or woody odorants in high-value perfume compositions and specialty flavorings.
• Organic Synthesis Building Block: Employed in Diels-Alder reactions, Michael additions, and hydrogenation processes to create complex organic molecules for material science and chemical research.
• Ligand & Catalyst Development: Utilized in the preparation of specialized ligands for asymmetric catalysis and metal-organic frameworks (MOFs).
• Polymer Modification: Functions as a monomer or cross-linking agent in the synthesis of specialty polymers with tailored properties.

Basic Information

Product Name	Ethyl Cyclopentylideneacetate
CAS No.	1903-22-6
Molecular Formula	C9H14O2
Molecular Weight	154.21 g/mol
Synonyms	Ethyl 2-(cyclopentylidene)acetate; 2-Cyclopentylideneacetic acid ethyl ester; Acetic acid, 2-cyclopentylidene-, ethyl ester; Ethyl (cyclopentylidene)acetate; Cyclopentylideneacetic acid ethyl ester; Ethyl cyclopentylideneethanoate
EINECS	217-613-5

Quality Control

Our Ethyl Cyclopentylideneacetate is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including chromatographic purity assessment and identity confirmation, to ensure it meets the high standards required for synthetic applications. Certificates of Analysis (COA) with full traceability are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, strong acids, and strong bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0%
Refractive Index (n20D)	1.4580 - 1.4620
Density (g/mL, 20°C)	0.980 - 1.010

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