Description

1-Cyclopentene-1-Carbonyl Chloride, 2,5,5-Trimethyl-3-Oxo- (9Ci) is a highly reactive acid chloride derivative of a trimethylcyclopentenone, serving as a critical building block for the synthesis of complex organic molecules. Its value lies in its ability to introduce a functionalized cyclopentene moiety, enabling the construction of novel chemical architectures with specific steric and electronic properties. This compound is essential for R&D chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials sectors seeking to develop new active ingredients or functional polymers.

Application

• Pharmaceutical Intermediate: Key synthon for the development of novel small-molecule drug candidates, particularly in medicinal chemistry programs targeting central nervous system (CNS) or metabolic diseases.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides, where its unique structure can contribute to improved efficacy and selectivity.
• Advanced Material Precursor: Serves as a monomer or cross-linking agent in the synthesis of specialty polymers, resins, and coatings with tailored thermal or mechanical properties.
• Organic Synthesis Reagent: A versatile reagent for academic and industrial research, facilitating Friedel-Crafts acylation, amide coupling, and esterification reactions to create complex heterocycles and functionalized compounds.
• Flavor & Fragrance Chemistry: Potential intermediate for synthesizing high-value aroma chemicals and musk analogs due to its substituted cyclopentene core.

Basic Information

Item	Detail
Product Name	1-Cyclopentene-1-Carbonyl Chloride, 2,5,5-Trimethyl-3-Oxo- (9Ci)
CAS No.	58626-57-6
Molecular Formula	C9H11ClO2
Molecular Weight	186.64 g/mol
Synonyms	2,5,5-Trimethyl-3-oxo-1-cyclopentene-1-carbonyl chloride; 2,5,5-Trimethyl-3-oxocyclopent-1-ene-1-carbonyl chloride; 3-Oxo-2,5,5-trimethyl-1-cyclopentene-1-carboxylic acid chloride; Trimethylcyclopentenone carbonyl chloride; 1-Cyclopentene-1-carbonyl chloride, 2,5,5-trimethyl-3-oxo-; (2,5,5-Trimethyl-3-oxocyclopent-1-en-1-yl)carbonyl chloride
EINECS	Contact for details

Quality Control

Every batch of 1-Cyclopentene-1-Carbonyl Chloride, 2,5,5-Trimethyl-3-Oxo- (9Ci) is produced and tested under a strict quality management system. We provide comprehensive analytical data to ensure the material meets the precise requirements of your synthetic application. A detailed Certificate of Analysis (COA), including purity assay and impurity profile, is available for each lot and supplied with every order to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and reacts with strong acids/organic solvents; therefore, it must be kept under an inert atmosphere (e.g., nitrogen or argon) in its original sealed packaging to prevent decomposition. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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