Description

1-Cyclobutene-1-Carboxylic Acid, 3-Methyl-, Methyl Ester (9Ci) is a specialized organic ester building block featuring a strained cyclobutene ring system. This compound is valued for its unique molecular geometry and reactivity, making it a critical intermediate in advanced synthetic chemistry. It is primarily sought by research and development chemists in the pharmaceutical and agrochemical sectors for constructing novel molecular scaffolds and active ingredients.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly those requiring complex, strained-ring architectures.
• Agrochemical Synthesis: Used in the research and development of new pesticides and herbicides, where its structure can impart unique biological activity.
• Organic Synthesis Building Block: Employed in academic and industrial R&D for constructing complex natural products and specialty chemicals via cycloaddition and functionalization reactions.
• Material Science Research: Investigated as a monomer or precursor for developing polymers with specific thermal or mechanical properties derived from the cyclobutene core.
• Flavor & Fragrance Intermediate: Potential use in the synthesis of complex aroma chemicals, leveraging the ester functional group and unique carbon skeleton.

Basic Information

Product Name	1-Cyclobutene-1-Carboxylic Acid, 3-Methyl-, Methyl Ester (9Ci)
CAS No.	60697-54-3
Molecular Formula	C7H10O2
Molecular Weight	126.15 g/mol
Synonyms	Methyl 3-methyl-1-cyclobutene-1-carboxylate; 3-Methyl-1-cyclobutene-1-carboxylic acid methyl ester; 1-Cyclobutene-1-carboxylic acid, 3-methyl-, methyl ester; Methyl 3-methylcyclobut-1-ene-1-carboxylate; 60697-54-3; 3-Methylcyclobut-1-ene-1-carboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Our 1-Cyclobutene-1-Carboxylic Acid, 3-Methyl-, Methyl Ester (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including chromatographic purity analysis and structural confirmation, to ensure consistent quality and identity. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available upon request 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 area at controlled room temperature (typically 15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider storing 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% (Typical 97-99%)
Water Content (KF)	≤ 0.5%

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