Description

1-Cyclobutene-1-Carboxylicacid,3-(1-Methylethylidene)-,Methylester(9Ci) is a specialized organic ester building block featuring a cyclobutene core with an isopropylidene substituent. This compound matters for its unique strained-ring structure, which is valuable in advanced synthetic chemistry for constructing complex molecular architectures. It is primarily needed by research chemists and process development scientists in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of novel drug candidates, particularly those requiring strained carbocyclic frameworks.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and insecticides with unique modes of action.
• Material Science Research: Acts as a monomer or cross-linking agent in the development of specialty polymers with tailored thermal or mechanical properties.
• Organic Synthesis Building Block: Employed in academic and industrial R&D for cycloaddition reactions, ring-opening polymerizations, and the construction of complex natural product analogs.
• Ligand and Catalyst Development: Utilized as a scaffold for creating novel chiral ligands or organometallic catalysts for asymmetric synthesis.
• Flavor & Fragrance Chemistry: Investigated as an intermediate for synthesizing unique aroma chemicals with complex cyclic structures.

Basic Information

Product Name	1-Cyclobutene-1-Carboxylicacid,3-(1-Methylethylidene)-,Methylester(9Ci)
CAS No.	122444-78-4
Molecular Formula	C9H12O2
Molecular Weight	152.19 g/mol
Synonyms	3-Isopropylidene-1-cyclobutene-1-carboxylic acid methyl ester; Methyl 3-isopropylidenecyclobut-1-ene-1-carboxylate; 1-Cyclobutene-1-carboxylic acid, 3-(1-methylethylidene)-, methyl ester; 3-(Prop-1-en-2-yl)cyclobut-1-ene-1-carboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Our 1-Cyclobutene-1-Carboxylicacid,3-(1-Methylethylidene)-,Methylester(9Ci) is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from heat, sparks, and open flames. This material is moisture-sensitive (hygroscopic) and should be handled under an inert atmosphere for prolonged storage or when opening containers to prevent degradation.

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.