Description

1-Cyclobutene-1-Carboxylicacid,4-Ethyl-,Methylester(9Ci) is a specialized organic ester building block featuring a cyclobutene ring system, offering unique steric and electronic properties for advanced synthesis. This compound is valued for its role as a key intermediate in the development of complex pharmaceutical molecules and novel agrochemicals. It is primarily sought by research chemists and process development scientists in the fine chemical, pharmaceutical, and agrochemical industries for constructing constrained ring systems and exploring new chemical spaces.

Application

• Pharmaceutical Intermediate: Serves as a critical precursor in the synthesis of active pharmaceutical ingredients (APIs) with constrained, bioactive ring structures.
• Agrochemical Research: Used in the development of novel herbicides, fungicides, and insecticides that require specific, rigid molecular frameworks.
• Material Science Monomer: Acts as a specialty monomer for creating polymers with unique thermal and mechanical properties derived from the cyclobutene unit.
• Organic Synthesis Building Block: Employed in academic and industrial R&D for cycloaddition reactions and the construction of complex, polycyclic compounds.
• Ligand and Catalyst Development: Utilized as a scaffold for designing novel chiral ligands and organometallic catalysts in asymmetric synthesis.
• Flavor & Fragrance Intermediate: Potential use in the synthesis of high-value aroma chemicals with novel olfactory profiles.

Basic Information

Product Name	1-Cyclobutene-1-Carboxylicacid,4-Ethyl-,Methylester(9Ci)
CAS No.	60697-57-6
Molecular Formula	C8H12O2
Molecular Weight	140.18 g/mol
Synonyms	4-Ethyl-1-cyclobutene-1-carboxylic acid methyl ester; Methyl 4-ethyl-1-cyclobutene-1-carboxylate; 1-Cyclobutene-1-carboxylic acid, 4-ethyl-, methyl ester; 4-Ethylcyclobut-1-ene-1-carboxylic acid methyl ester; Methyl 4-ethylcyclobut-1-ene-1-carboxylate; 60697-57-6; 4-Ethyl-1-cyclobutene carboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Our production of 1-Cyclobutene-1-Carboxylicacid,4-Ethyl-,Methylester(9Ci) adheres to stringent internal quality standards to ensure batch-to-batch consistency and high purity for research and development applications. All materials are accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles. We support cGMP-compliant manufacturing for advanced applications, ensuring traceability and documentation meet the needs of regulated industries.

Storage

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

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%
Residue on Ignition	≤ 0.1%

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