Description

2-Propynoic Acid, 3-(1-Cyclopenten-1-Yl)-, Methyl Ester (9Ci) is a specialized organic compound featuring a cyclopentenyl group attached to a propargylic ester core. This unique molecular architecture makes it a valuable high-purity building block for advanced chemical synthesis, particularly in pharmaceutical and agrochemical research. It is primarily sought after by R&D chemists and process development scientists working on novel active ingredients. The compound's structure offers versatile reactivity for constructing complex molecular frameworks.

Application

• Pharmaceutical Intermediate: Serves as a key synthon in the research and development of new drug candidates, particularly those requiring cyclopentene or acetylene functional groups.
• Agrochemical Synthesis: Used in the creation of advanced pesticides, herbicides, and plant growth regulators where its specific ring system is incorporated into the active molecule.
• Material Science Research: Acts as a monomer or precursor in the development of specialty polymers and advanced organic materials with tailored properties.
• Organic Synthesis Building Block: Employed in academic and industrial laboratories for constructing complex natural product analogs and other fine chemicals.
• Ligand and Catalyst Development: Utilized in the synthesis of novel ligands for metal catalysis or as a substrate for developing new synthetic methodologies.

Basic Information

Product Name	2-Propynoic Acid, 3-(1-Cyclopenten-1-Yl)-, Methyl Ester (9Ci)
CAS No.	169478-78-8
Molecular Formula	C9H10O2
Molecular Weight	150.17 g/mol
Synonyms	Methyl 3-(cyclopent-1-en-1-yl)propiolate; 3-(1-Cyclopenten-1-yl)-2-propynoic Acid Methyl Ester; Methyl 3-(1-Cyclopentenyl)propiolate; 3-Cyclopenten-1-yl-2-propynoic Acid Methyl Ester; Propiolic Acid, 3-(1-Cyclopenten-1-yl)-, Methyl Ester; Methyl (3-Cyclopenten-1-ylpropiolate); 169478-78-8; Cyclopentenylpropiolic Acid Methyl Ester
EINECS	Contact for details

Quality Control

We supply this advanced intermediate under a rigorous quality management system. Each batch is produced and analyzed to meet exacting customer specifications, with purity typically exceeding 95% (by HPLC). A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to ensure traceability and consistency for your critical R&D and scale-up processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from heat, sparks, and open flames. For long-term storage, consider maintaining under an inert atmosphere to preserve stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
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.