Description

Cyclobutanecarboxylic Acid, 1-Methyl-2-Oxo-, Ethyl Ester (9Ci) is a specialized organic ester building block with a constrained cyclobutane ring system. This compound matters for its role as a key chiral intermediate in the synthesis of complex pharmaceutical molecules and advanced materials. It is primarily needed by research and development chemists and process engineers in the pharmaceutical, agrochemical, and fine chemical industries for constructing novel molecular architectures. The CAS number for this product is 171512-02-0.

Application

• Pharmaceutical Intermediate: A critical chiral synthon for the development of active pharmaceutical ingredients (APIs), particularly in protease inhibitor and other small-molecule drug candidates.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides and pesticides, where the cyclobutane scaffold can impart unique biological activity.
• Fine Chemical Manufacturing: Serves as a versatile building block for creating complex flavors, fragrances, and specialty polymers.
• Academic & Industrial Research: A valuable reagent for methodological development in organic synthesis, including studies on ring strain and stereoselective transformations.
• Material Science Precursor: Potential use in the synthesis of monomers for specialty polymers with tailored thermal and mechanical properties.

Basic Information

Product Name	Cyclobutanecarboxylic Acid, 1-Methyl-2-Oxo-, Ethyl Ester (9Ci)
CAS No.	171512-02-0
Molecular Formula	C8H12O3
Molecular Weight	156.18 g/mol
Synonyms	Ethyl 1-Methyl-2-oxocyclobutanecarboxylate; 1-Methyl-2-oxocyclobutanecarboxylic Acid Ethyl Ester; 2-Oxo-1-methylcyclobutanecarboxylic Acid Ethyl Ester; Ethyl 2-Oxo-1-methylcyclobutanecarboxylate; Cyclobutanecarboxylic acid, 1-methyl-2-oxo-, ethyl ester; 171512-02-0; 9CI
EINECS	Contact for details

Quality Control

Every batch of Cyclobutanecarboxylic Acid, 1-Methyl-2-Oxo-, Ethyl Ester (9Ci) is produced and tested under strict quality management protocols. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, identity, 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 away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is 2-8°C for long-term stability, although the product is typically stable at controlled room temperature for shorter periods. Keep container tightly sealed when not in use to prevent moisture absorption and potential degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Purity (GC)	≥ 98.0%
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.