Description

2-Cyclopenten-1-One, 4-Ethynyl-3,5-Dimethyl-, trans- (9Ci) is a specialized, high-purity organic building block featuring a reactive ethynyl group on a functionalized cyclopentenone core. This compound matters as a versatile synthon for constructing complex molecular architectures, particularly in advanced pharmaceutical and agrochemical research. It is primarily needed by R&D chemists and process development scientists in the fine chemical, pharmaceutical, and material science industries for applications in asymmetric synthesis and heterocyclic chemistry.

Application

• Pharmaceutical Intermediate: Serves as a key chiral precursor in the synthesis of novel active pharmaceutical ingredients (APIs), especially for prostaglandin analogs and other bioactive molecules.
• Agrochemical Synthesis: Used in the research and development of new generation pesticides and herbicides, leveraging its reactive scaffold.
• Material Science Research: Acts as a monomer or cross-linking agent in the development of specialty polymers and advanced organic materials.
• Asymmetric Catalysis: Employed as a substrate or ligand precursor in the development of new catalytic systems for stereoselective transformations.
• Academic & Industrial R&D: A valuable tool for synthetic organic chemists exploring new reaction methodologies and natural product synthesis.
• Fine Chemical Production: Utilized in the custom synthesis of complex, high-value specialty chemicals for various industrial sectors.

Basic Information

Product Name	2-Cyclopenten-1-One, 4-Ethynyl-3,5-Dimethyl-, trans- (9Ci)
CAS No.	65984-07-8
Molecular Formula	C9H10O
Molecular Weight	134.18 g/mol
Synonyms	trans-4-Ethynyl-3,5-dimethyl-2-cyclopenten-1-one; 4-Ethynyl-3,5-dimethylcyclopent-2-en-1-one; (trans)-4-Ethynyl-3,5-dimethyl-2-cyclopenten-1-one; 2-Cyclopenten-1-one, 4-ethynyl-3,5-dimethyl-, trans-; 65984-07-8; 4-Ethynyl-3,5-dimethyl-2-cyclopentenone
EINECS	Contact for details

Quality Control

Our 2-Cyclopenten-1-One, 4-Ethynyl-3,5-Dimethyl-, trans- (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high chemical purity and isomeric consistency. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C for long-term stability. Allow the container to reach room temperature before opening to minimize moisture ingress.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Isomeric Purity (GC/HPLC)	≥ 98.0% trans-isomer
Water Content (KF)	≤ 0.5%

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