Description

1-Cyclopentene-1-Carbonyl Chloride, 5,5-Dimethyl- (9Ci) is a specialized organic building block featuring a reactive acid chloride group on a substituted cyclopentene ring. This compound matters as a key intermediate for introducing the sterically hindered 5,5-dimethylcyclopentenyl moiety into target molecules, enabling the synthesis of complex structures. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical and agrochemical industries for constructing novel active ingredients and advanced materials.

Application

• Pharmaceutical Intermediate: Serves as a crucial precursor in the synthesis of novel drug candidates, particularly those requiring a functionalized cyclopentene scaffold.
• Agrochemical Synthesis: Used in the research and development of new pesticides and herbicides, where its unique structure can contribute to biological activity.
• Material Science Research: Acts as a monomer or cross-linking agent in the development of specialty polymers with tailored thermal or mechanical properties.
• Organic Synthesis Building Block: Employed in academic and industrial laboratories for constructing complex natural products or other fine chemicals via amide or ester formation.
• Ligand and Catalyst Development: Utilized to create novel chiral or sterically hindered ligands for asymmetric catalysis.

Basic Information

Product Name	1-Cyclopentene-1-Carbonyl Chloride, 5,5-Dimethyl- (9Ci)
CAS No.	154222-76-1
Molecular Formula	C8H11ClO
Molecular Weight	158.62 g/mol
Synonyms	5,5-Dimethyl-1-cyclopentene-1-carbonyl chloride; 5,5-Dimethylcyclopent-1-ene-1-carbonyl chloride; 5,5-Dimethyl-1-cyclopentenecarboxylic acid chloride; 5,5-Dimethylcyclopent-1-enecarboxylic acid chloride; 5,5-Dimethyl-1-cyclopentenoyl chloride
EINECS	Contact for details

Quality Control

Our 1-Cyclopentene-1-Carbonyl Chloride, 5,5-Dimethyl- (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including chromatographic purity assays and identity confirmation, to ensure it meets the high standards required for research and process chemistry. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). Due to its hygroscopic and moisture-sensitive nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent decomposition. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 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.