Description

Cyclopentanecarboxylic Acid, 3-Oxo-, Methyl Ester, (S)- (9Ci) is a high-purity chiral building block and key intermediate in organic synthesis. Its value lies in its defined stereochemistry and functional groups, which are critical for constructing complex molecules with high enantiomeric purity. This compound is essential for researchers and manufacturers in the pharmaceutical and fine chemical industries, particularly for developing active pharmaceutical ingredients (APIs) and advanced materials.

Application

• Pharmaceutical Intermediate: A crucial chiral synthon for the synthesis of prostaglandins, steroid analogs, and other bioactive molecules.
• Asymmetric Synthesis: Used as a starting material or intermediate in catalytic asymmetric reactions to introduce the (S)-configuration.
• Fine Chemical Production: Serves as a building block for fragrances, flavors, and specialty agrochemicals requiring specific stereochemistry.
• Academic & R&D: Employed in medicinal chemistry research for drug discovery and process development.
• Chemical Reference Standard: Used for analytical method development, validation, and quality control in chiral analysis.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 3-Oxo-, Methyl Ester, (S)- (9Ci)
CAS No.	132076-32-5
Molecular Formula	C8H12O3
Molecular Weight	156.18 g/mol
Synonyms	(S)-3-Oxocyclopentanecarboxylic acid methyl ester; Methyl (S)-3-oxocyclopentanecarboxylate; (S)-Methyl 3-oxocyclopentanecarboxylate; (S)-3-Oxo-cyclopentanecarboxylic acid methyl ester; (S)-3-Oxocyclopentane-1-carboxylic acid methyl ester; (S)-Methyl 3-oxocyclopentane-1-carboxylate; (S)-3-Carbomethoxycyclopentanone
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 3-Oxo-, Methyl Ester, (S)- (9Ci) is produced under strict quality management systems. Every batch undergoes rigorous analytical testing, including chiral purity assessment by HPLC, to ensure it meets the high standards required for pharmaceutical R&D and production. Certificates of Analysis (COA) detailing identity, purity, enantiomeric excess, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Enantiomeric Excess (Chiral HPLC)	≥ 99.0%
Water Content (KF)	≤ 0.5%

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