Description

Cyclopentanecarboxylic Acid, 2-Oxo-, Methyl Ester, (1S)- (9Ci) is a high-purity chiral building block of significant importance in advanced organic synthesis. This compound matters as a key intermediate for constructing complex molecules with defined stereochemistry, which is critical for efficacy in pharmaceutical and agrochemical applications. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and fine chemical industries for the synthesis of active pharmaceutical ingredients (APIs) and other specialty chemicals.

Application

• As a versatile chiral synthon in the research and development of novel pharmaceutical compounds.
• Key intermediate in the synthesis of prostaglandins and other biologically active molecules with cyclopentane cores.
• Building block for creating complex natural products and fragrances requiring specific stereochemical configurations.
• Precursor in agrochemical research for developing new herbicides or plant growth regulators.
• Used in asymmetric synthesis to introduce the (1S)-cyclopentane moiety into target molecules.
• Starting material for the preparation of specialized ligands and catalysts in organic chemistry.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 2-Oxo-, Methyl Ester, (1S)- (9Ci)
CAS No.	265317-94-0
Molecular Formula	C8H12O3
Molecular Weight	156.18 g/mol
Synonyms	(1S)-2-Oxocyclopentanecarboxylic Acid Methyl Ester; Methyl (1S)-2-Oxocyclopentanecarboxylate; (S)-Methyl 2-Oxocyclopentanecarboxylate; L-Methyl 2-Oxocyclopentanecarboxylate; (-)-Methyl 2-Oxocyclopentanecarboxylate; Methyl (S)-2-Oxocyclopentane-1-carboxylate; (S)-(-)-2-Oxocyclopentanecarboxylic Acid Methyl Ester
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 2-Oxo-, Methyl Ester, (1S)- (9Ci) is produced under strict quality management systems to ensure batch-to-batch consistency and high purity for research and scale-up applications. All products undergo rigorous analytical testing, including chiral purity analysis by HPLC, to meet exacting customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, enantiomeric excess, and impurity profiles is provided with each shipment.

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). Keep the container tightly sealed in a dry environment to minimize exposure to moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Enantiomeric Excess (Chiral HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%

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