Description

Cyclobutanecarboxylic Acid, 2-Methylene-, Ethyl Ester (9Ci) is a specialized organic ester building block characterized by its unique cyclobutane ring and reactive methylene group. This compound matters as a versatile intermediate for synthesizing complex molecules, offering chemists a valuable handle for ring-opening, cycloaddition, and functionalization reactions. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials industries for creating novel active ingredients and functional polymers.

Application

• Pharmaceutical Intermediate: Serves as a key synthon in the research and development of novel drug candidates, particularly for constructing strained-ring systems.
• Agrochemical Synthesis: Used in the production of advanced pesticides and herbicides where the cyclobutane moiety can impart specific biological activity.
• Polymer & Material Science: Acts as a monomer or cross-linking agent for creating polymers with unique thermal or mechanical properties.
• Organic Synthesis Building Block: Employed in academic and industrial research for [2+2] cycloadditions, ring-expansion reactions, and as a precursor to other functionalized cyclobutanes.
• Flavor & Fragrance Industry: Potential use in the synthesis of complex aroma chemicals due to its ester functionality and unique carbon skeleton.
• Ligand & Catalyst Development: Useful for preparing novel chelating ligands or organocatalysts in asymmetric synthesis.

Basic Information

Product Name	Cyclobutanecarboxylic Acid, 2-Methylene-, Ethyl Ester (9Ci)
CAS No.	35825-77-5
Molecular Formula	C8H12O2
Molecular Weight	140.18 g/mol
Synonyms	Ethyl 2-Methylenecyclobutanecarboxylate; 2-Methylenecyclobutanecarboxylic Acid Ethyl Ester; Ethyl 2-Methylenebutane-1-carboxylate; Cyclobutanecarboxylic acid, 2-methylene-, ethyl ester; 2-Methylenecyclobutanecarboxylic acid ethyl ester; Ethyl (2-methylenebutyl)carboxylate; 35825-77-5
EINECS	Contact for details

Quality Control

Our Cyclobutanecarboxylic Acid, 2-Methylene-, Ethyl Ester (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including GC/HPLC for purity and identity confirmation via NMR and IR spectroscopy, to ensure it meets the high standards required for research and process chemistry. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong bases and incompatible organic solvents. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

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