Description

Cyclopentanecarbonyl Chloride, 2-Methyl- (9Ci) is a versatile and highly reactive acyl chloride derivative, serving as a critical building block in advanced organic synthesis. Its value lies in its ability to efficiently introduce the 2-methylcyclopentanecarbonyl moiety, enabling the construction of complex molecular architectures. This intermediate is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, particularly for developing novel active ingredients and fine chemicals. The compound is supplied with full traceability under CAS NO 344243-49-8.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of proprietary drug candidates, especially those targeting central nervous system (CNS) disorders and metabolic diseases.
• Agrochemical Synthesis: Used in the production of advanced herbicides and fungicides, where the cyclopentane ring contributes to biological activity and environmental profile.
• Material Science Precursor: Acts as a monomer or cross-linking agent in the development of specialty polymers with tailored thermal and mechanical properties.
• Ligand and Catalyst Development: Employed in organometallic chemistry to create novel chiral ligands and catalysts for asymmetric synthesis.
• Flavor & Fragrance Ingredient Synthesis: Serves as a starting material for creating complex musk and amber scent molecules.
• Custom Synthesis & Contract Manufacturing: A pivotal reagent for custom synthesis houses and CDMOs (Contract Development and Manufacturing Organizations) serving global clients.

Basic Information

Product Name	Cyclopentanecarbonyl Chloride, 2-Methyl- (9Ci)
CAS No.	344243-49-8
Molecular Formula	C7H11ClO
Molecular Weight	146.61 g/mol
Synonyms	2-Methylcyclopentanecarbonyl chloride; 2-Methylcyclopentane-1-carbonyl chloride; 2-Methyl-1-cyclopentanecarbonyl chloride; α-Methylcyclopentanecarbonyl chloride; Cyclopentanecarbonyl chloride, 2-methyl-; 344243-49-8; 2-Methylcyclopentylcarbonyl chloride
EINECS	Contact for details

Quality Control

Every batch of Cyclopentanecarbonyl Chloride, 2-Methyl- (9Ci) is produced and tested under a strict quality management system. We ensure high purity and lot-to-lot consistency through advanced analytical techniques including GC, HPLC, and NMR. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment, supporting your regulatory and R&D requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature and reactivity as a strong acid/organic solvent, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent hydrolysis and degradation. Keep away from heat, open flames, and incompatible materials such as bases, alcohols, and amines.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Related Substances (GC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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