Description

Diethyl 3-Cyclopentene-1,1-Dicarboxylate is a versatile diester building block, prized for its reactive cyclopentene ring and two ester functionalities, which make it a valuable synthon in advanced organic synthesis. Its primary value lies in enabling the efficient construction of complex molecular architectures, including carbocycles and heterocycles, which are crucial in pharmaceutical and agrochemical research. This compound is essential for R&D chemists and process development scientists in the fine chemical, pharmaceutical, and agrochemical industries seeking to develop novel active ingredients and complex intermediates.

Application

• Pharmaceutical Intermediate: A key building block for synthesizing complex carbocyclic and heterocyclic scaffolds found in active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Used in the research and development of novel herbicides, fungicides, and insecticides requiring specific ring structures.
• Fine Chemical Production: Serves as a precursor for specialty chemicals, flavors, and fragrances where the cyclopentene moiety is desired.
• Material Science Research: Employed in the synthesis of monomers or specialty polymers with unique thermal or mechanical properties.
• Academic & Industrial R&D: A valuable reagent for methodology development in organic chemistry, particularly in cycloaddition and ring-opening reactions.

Basic Information

Product Name	Diethyl 3-Cyclopentene-1,1-Dicarboxylate
CAS No.	21622-00-4
Molecular Formula	C11H16O4
Molecular Weight	212.24 g/mol
Synonyms	3-Cyclopentene-1,1-dicarboxylic acid diethyl ester; Diethyl 3-cyclopentene-1,1-dicarboxylate; 1,1-Bis(ethoxycarbonyl)-3-cyclopentene; Diethyl cyclopent-3-ene-1,1-dicarboxylate; Ethyl 3-cyclopentene-1,1-dicarboxylate; 3-Cyclopentene-1,1-dicarboxylic acid, diethyl ester; Diethyl 1,1-cyclopentenedicarboxylate
EINECS	244-492-5

Quality Control

Our Diethyl 3-Cyclopentene-1,1-Dicarboxylate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including GC/HPLC for purity and identity confirmation (IR, NMR), to ensure it meets exacting standards for research and production. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee traceability and consistency.

Storage

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

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.4580 - 1.4620
Density (g/mL, 20°C)	1.080 - 1.100

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