Description

Cyclobutanecarboxylic Acid, 2-Methylene-3-Oxo-, Methyl Ester (9Ci) is a specialized, high-value chemical intermediate characterized by its reactive cyclobutane and α,β-unsaturated ester functionalities. This compound is essential for advanced organic synthesis, particularly in the construction of complex molecular scaffolds for pharmaceutical and agrochemical research. It serves as a critical building block for medicinal chemists and process development scientists working on novel active ingredients.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates, especially those containing strained ring systems or specific carbonyl motifs.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and plant growth regulators.
• Material Science Research: Serves as a monomer or cross-linking agent in the development of specialty polymers with unique thermal or mechanical properties.
• Organic Synthesis Building Block: Employed in [4+2] cycloadditions, Michael additions, and other ring-forming reactions to create complex, polycyclic structures.
• Flavor & Fragrance Industry: Potential intermediate for synthesizing specific musk or woody odorant molecules.
• Academic & R&D: A valuable reagent for methodological studies in synthetic organic chemistry and catalysis.

Basic Information

Product Name	Cyclobutanecarboxylic Acid, 2-Methylene-3-Oxo-, Methyl Ester (9Ci)
CAS No.	112139-41-0
Molecular Formula	C7H8O3
Molecular Weight	140.14 g/mol
Synonyms	2-Methylene-3-oxocyclobutanecarboxylic acid methyl ester; Methyl 2-methylene-3-oxocyclobutanecarboxylate; 3-Oxo-2-methylencyclobutanecarboxylic acid methyl ester; Cyclobutanecarboxylic acid, 2-methylene-3-oxo-, methyl ester; 112139-41-0; Methyl 2-methylidene-3-oxocyclobutanecarboxylate
EINECS	Contact for details

Quality Control

We maintain stringent quality control protocols for all our chemical intermediates. Production of Cyclobutanecarboxylic Acid, 2-Methylene-3-Oxo-, Methyl Ester adheres to in-house specifications designed to ensure batch-to-batch consistency and high purity for research and development applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity (typically by GC or HPLC), 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 area at a controlled room temperature (typically 15-25°C). Keep away from strong acids and oxidizing agents. Due to its light-sensitive nature, containers should be kept in opaque packaging or amber glass.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 95.0% (Area %)
Water Content (KF)	≤ 0.5%

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