Description

Cyclopentanecarboxylic Acid, 1-Acetyl-, Methyl Ester (9Ci) is a specialized organic ester building block with a unique fused-ring structure. This compound matters as a versatile chiral synthon and intermediate in advanced organic synthesis, offering a rigid cyclopentane backbone for constructing complex molecular architectures. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and fine chemical industries for applications such as asymmetric synthesis and the development of active pharmaceutical ingredients (APIs).

Application

• Pharmaceutical Intermediate: A key chiral building block for the synthesis of novel active pharmaceutical ingredients (APIs) and drug candidates.
• Asymmetric Synthesis: Used as a precursor or ligand in catalytic asymmetric reactions to introduce stereogenic centers.
• Agrochemical Research: Serves as an intermediate in the development of new herbicides, fungicides, and plant growth regulators.
• Fine Chemical Synthesis: Employed in the multi-step synthesis of complex natural products, flavors, and fragrances.
• Material Science: Potential monomer or cross-linking agent in the research of specialty polymers and advanced materials.
• Academic & Industrial R&D: A valuable reagent for methodological development in organic chemistry and process chemistry optimization.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 1-Acetyl-, Methyl Ester (9Ci)
CAS No.	171924-94-0
Molecular Formula	C9H14O3
Molecular Weight	170.21 g/mol
Synonyms	Methyl 1-acetylcyclopentanecarboxylate; 1-Acetylcyclopentanecarboxylic acid methyl ester; Methyl 1-acetylcyclopentane-1-carboxylate; Cyclopentanecarboxylic acid, 1-acetyl-, methyl ester; 1-Acetyl-1-(methoxycarbonyl)cyclopentane
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 1-Acetyl-, Methyl Ester (9Ci) is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay and impurity profiles. For custom synthesis or specific purity requirements, our technical team is available to discuss tailored quality specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents. The container should be kept tightly sealed to prevent moisture absorption and potential degradation.

Specification

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