Description

1-Cyclopentene-1-Carboxylic Acid, 2-(Hydroxymethyl)-, Methyl Ester (9Ci) is a specialized, high-purity organic building block featuring a unique cyclopentene core functionalized with both ester and hydroxymethyl groups. This compound is valued for its role as a versatile chiral synthon in advanced pharmaceutical and fine chemical synthesis, enabling the construction of complex molecular architectures. It is primarily sought by research and development teams in the pharmaceutical, agrochemical, and advanced material sectors for creating novel active ingredients and functional intermediates.

Application

• Pharmaceutical Intermediate: A key chiral building block for the synthesis of novel drug candidates, particularly in therapeutic areas requiring complex, constrained ring systems.
• Agrochemical Synthesis: Used in the research and development of new generation pesticides and herbicides, where its functionalized cyclopentene structure can contribute to unique biological activity.
• Fine Chemical Production: Serves as a precursor for specialty chemicals, flavors, and fragrances requiring specific stereochemistry and functional group arrays.
• Material Science Research: Investigated as a monomer or cross-linking agent for developing novel polymers with tailored thermal or mechanical properties.
• Academic & Contract Research: Employed in university and CRO laboratories for methodological development in organic synthesis and catalysis studies.

Basic Information

Product Name	1-Cyclopentene-1-Carboxylic Acid, 2-(Hydroxymethyl)-, Methyl Ester (9Ci)
CAS No.	344747-26-8
Molecular Formula	C8H12O3
Molecular Weight	156.18 g/mol
Synonyms	Methyl 2-(hydroxymethyl)-1-cyclopentene-1-carboxylate; 1-Cyclopentene-1-carboxylic acid, 2-(hydroxymethyl)-, methyl ester; 2-(Hydroxymethyl)-1-cyclopentenecarboxylic acid methyl ester; Methyl 2-(hydroxymethyl)cyclopent-1-enecarboxylate; (2-Hydroxymethyl-cyclopent-1-enyl)-carboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Our production of 1-Cyclopentene-1-Carboxylic Acid, 2-(Hydroxymethyl)-, Methyl Ester (9Ci) adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity for sensitive synthetic applications. Each lot is supported by a comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles. We can supply material compliant with cGMP standards for advanced pharmaceutical R&D upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (typically 15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider holding under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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