Description

Cyclopentene, 3-Chloro-1-Ethynyl- (9Ci) is a specialized halogenated alkyne derivative of cyclopentene, serving as a versatile and reactive building block in advanced organic synthesis. Its unique structure, featuring both a chloro substituent and an ethynyl group on the cyclopentene ring, makes it a critical intermediate for constructing complex molecular architectures. This compound is essential for research and development chemists in the pharmaceutical and agrochemical industries, where it is used to introduce functionalized cyclopentane motifs into target molecules.

Application

• Pharmaceutical Intermediate: Key synthon for the development of novel active pharmaceutical ingredients (APIs), particularly those containing functionalized cyclopentane or cyclopentene cores.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides, where its reactive groups allow for the creation of diverse chemical structures.
• Material Science Research: Serves as a monomer or precursor in the development of specialized polymers and advanced organic materials with tailored properties.
• Organic Synthesis Reagent: A valuable building block in academic and industrial R&D for cycloaddition reactions, cross-coupling, and other catalytic transformations to create complex organic compounds.
• Ligand and Catalyst Development: Utilized in the synthesis of novel ligands and organometallic catalysts for asymmetric synthesis and other catalytic processes.

Basic Information

Item	Detail
Product Name	Cyclopentene, 3-Chloro-1-Ethynyl- (9Ci)
CAS No.	38693-55-9
Molecular Formula	C7H7Cl
Molecular Weight	126.58 g/mol
Synonyms	3-Chloro-1-ethynylcyclopentene; 1-Ethynyl-3-chlorocyclopentene; 3-Chloro-1-ethynylcyclopent-1-ene; 3-Chlorocyclopent-1-en-1-ylethyne; 1-Chloro-3-ethynylcyclopentene; NSC 163064
EINECS	Contact for details

Quality Control

Our Cyclopentene, 3-Chloro-1-Ethynyl- (9Ci) is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong acids and bases. Recommended storage temperature is 2-8°C for long-term stability. The compound is sensitive to strong acid/organic solvent conditions.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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