Description

Cyclobutanecarboxylic Acid, 2-Methylene-3-Oxo-, Ethyl Ester (9Ci) is a specialized, high-purity organic ester building block with a unique functionalized cyclobutane core. This compound is valued for its reactive α,β-unsaturated ketone moiety, making it a versatile synthon for constructing complex molecular architectures in advanced chemical synthesis. It is primarily sought by research and development chemists in the pharmaceutical and agrochemical industries for applications in medicinal chemistry, process development, and the synthesis of novel active ingredients.

Application

• Pharmaceutical Intermediate: A key building block for the synthesis of novel drug candidates, particularly those containing strained ring systems.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and insecticides with complex cyclic structures.
• Advanced Material Precursor: Serves as a monomer or cross-linking agent in the development of specialty polymers and functional materials.
• Organic Synthesis Reagent: Employed in Diels-Alder reactions, Michael additions, and other cycloaddition or conjugate addition chemistry to create complex organic molecules.
• Chemical Research & Development: A valuable tool for academic and industrial R&D labs exploring new synthetic methodologies and reaction pathways.
• Flavor & Fragrance Intermediate: Potential use in the synthesis of complex aroma chemicals and fragrance ingredients.

Basic Information

Product Name	Cyclobutanecarboxylic Acid, 2-Methylene-3-Oxo-, Ethyl Ester (9Ci)
CAS No.	220301-46-2
Molecular Formula	C8H10O3
Molecular Weight	154.16 g/mol
Synonyms	Ethyl 2-Methylene-3-oxocyclobutanecarboxylate; 2-Methylene-3-oxocyclobutanecarboxylic Acid Ethyl Ester; Ethyl (2-Methylene-3-oxocyclobutane)carboxylate; 3-Oxo-2-methylencyclobutanecarboxylic Acid Ethyl Ester; Cyclobutanecarboxylic acid, 2-methylene-3-oxo-, ethyl ester; 220301-46-2; AI3-32011
EINECS	Contact for details

Quality Control

Our production of Cyclobutanecarboxylic Acid, 2-Methylene-3-Oxo-, Ethyl Ester (9Ci) adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at controlled room temperature (15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents. For long-term storage, consider storing under an inert atmosphere.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (by 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.