Description

Cyclopentanecarboxylic Acid, 2-(2-Butynyl)-5-Oxo-, Methyl Ester (9Ci) is a specialized organic compound featuring a cyclopentane core functionalized with a carboxylic acid methyl ester and a butynyl ketone moiety. This unique molecular architecture makes it a valuable advanced pharmaceutical intermediate and a versatile building block for complex organic synthesis. It is primarily sought after by research and development teams in the pharmaceutical, agrochemical, and fine chemical sectors for constructing novel active molecules.

Application

• Pharmaceutical Intermediate: A key synthon in the research and development of new active pharmaceutical ingredients (APIs), particularly for complex cyclic structures.
• Agrochemical Synthesis: Serves as a building block for creating novel herbicides, fungicides, and plant growth regulators with specific activity profiles.
• Fine Chemical Production: Used in the synthesis of specialty chemicals, flavors, fragrances, and other high-value organic compounds.
• Academic & Industrial Research: A valuable reagent for methodological studies in organic chemistry, including cyclization and cross-coupling reactions.
• Material Science Precursor: Potential use in the development of specialty polymers and functional materials with tailored properties.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 2-(2-Butynyl)-5-Oxo-, Methyl Ester (9Ci)
CAS No.	811784-49-3
Molecular Formula	C12H16O3
Molecular Weight	208.25 g/mol
Synonyms	Methyl 2-(but-2-yn-1-yl)-5-oxocyclopentanecarboxylate; 2-(2-Butynyl)-5-oxocyclopentanecarboxylic Acid Methyl Ester; 5-Oxo-2-(2-butynyl)cyclopentanecarboxylic Acid Methyl Ester; Cyclopentanecarboxylic acid, 2-(2-butynyl)-5-oxo-, methyl ester; Methyl 5-oxo-2-(2-butynyl)cyclopentanecarboxylate
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 2-(2-Butynyl)-5-Oxo-, Methyl Ester (9Ci) is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistent composition. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

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 storing under an inert atmosphere to maintain optimal stability.

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.