Description

Cyclopentaneacetic Acid, 1-(Chlorocarbonyl)-, Methyl Ester (9Ci) is a specialized organic building block featuring a cyclopentane ring and a reactive acid chloride ester functional group. This compound is valued for its role as a key synthetic intermediate in the preparation of complex molecules, particularly in pharmaceutical research and fine chemical synthesis. It is primarily sought by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and advanced material sectors for constructing novel molecular architectures.

Application

• Pharmaceutical Intermediate: A crucial building block for the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates, particularly those containing cyclopentane-based scaffolds.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and pesticides where the cyclopentane moiety imparts specific biological activity.
• Fine Chemical Production: Serves as a precursor in the manufacture of specialty chemicals, flavors, fragrances, and advanced organic materials.
• Academic & Industrial Research: Employed in organic chemistry laboratories for method development and the exploration of new chemical reactions and pathways.
• Peptide Mimetic & Protease Inhibitor Development: The reactive carbonyl chloride group makes it suitable for constructing peptide analogs and enzyme inhibitors.

Basic Information

Product Name	Cyclopentaneacetic Acid, 1-(Chlorocarbonyl)-, Methyl Ester (9Ci)
CAS No.	411238-23-8
Molecular Formula	C9H13ClO3
Molecular Weight	204.65 g/mol
Synonyms	1-(Chlorocarbonyl)cyclopentaneacetic acid methyl ester; Methyl 1-(chlorocarbonyl)cyclopentaneacetate; Cyclopentaneacetic acid, 1-(chlorocarbonyl)-, methyl ester; 1-(Methoxycarbonyl)cyclopentylacetyl chloride; (1-(Methoxycarbonyl)cyclopentyl)acetyl chloride
EINECS	Contact for details

Quality Control

Our production of Cyclopentaneacetic Acid, 1-(Chlorocarbonyl)-, Methyl Ester adheres to stringent internal quality standards to ensure batch-to-batch consistency and reliability for your synthetic processes. Each lot is analyzed using advanced techniques including GC, HPLC, and NMR to confirm identity, purity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment and is available upon request.

Storage

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

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Identification (NMR)	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.