Description

Cyclopropanecarbonyl Chloride, 2-Methyl-2-(1-Methylethenyl)- (9Ci) is a specialized organic acid chloride derivative featuring a cyclopropane ring and an isopropenyl group, making it a valuable and reactive building block for advanced chemical synthesis. Its core value lies in enabling the efficient introduction of the sterically hindered 2-methyl-2-(1-methylethenyl)cyclopropanecarbonyl moiety into target molecules, which is critical for developing compounds with specific three-dimensional architectures. This intermediate is primarily sought by R&D chemists and process development teams in the pharmaceutical and agrochemical industries for constructing novel active ingredients.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, particularly in medicinal chemistry programs targeting protease inhibitors or other biologically active molecules requiring a rigid cyclopropane scaffold.
• Agrochemical Synthesis: Used in the research and development of next-generation pesticides and herbicides, where the cyclopropane structure can impart unique biological activity and stability.
• Advanced Material Precursor: Serves as a monomer or cross-linking agent in the development of specialty polymers with tailored thermal or mechanical properties.
• Fine Chemical Production: Employed in multi-step organic synthesis to create complex fragrance ingredients, flavors, or other high-value specialty chemicals.
• Academic & Industrial Research: A crucial reagent in methodological studies and for exploring new chemical spaces in catalysis and synthetic methodology development.

Basic Information

Product Name	Cyclopropanecarbonyl Chloride, 2-Methyl-2-(1-Methylethenyl)- (9Ci)
CAS No.	96043-39-9
Molecular Formula	C9H13ClO
Molecular Weight	172.65 g/mol
Synonyms	2-Methyl-2-(1-methylethenyl)cyclopropanecarbonyl chloride; 2-Isopropenyl-2-methylcyclopropanecarbonyl chloride; (2-Isopropenyl-2-methylcyclopropyl)carbonyl chloride; 2-Methyl-2-vinylcyclopropanecarbonyl chloride (related isomer); Cyclopropanecarbonyl chloride, 2-isopropenyl-2-methyl-; 96043-39-9; (2-Methyl-2-vinylcyclopropyl)carbonyl chloride (common name variant)
EINECS	Contact for details

Quality Control

Our production of Cyclopropanecarbonyl Chloride, 2-Methyl-2-(1-Methylethenyl)- (9Ci) adheres to stringent internal quality standards to ensure batch-to-batch consistency and high purity for sensitive synthetic applications. Each lot undergoes comprehensive analytical characterization, including chromatographic purity assays and structural confirmation. Certificates of Analysis (COA) detailing specific results for purity, identity, and impurity profiles are provided and available upon request to support your quality and regulatory documentation.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Due to its moisture-sensitive (hygroscopic) nature and reactivity as a strong acid/organic solvent derivative, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent hydrolysis and degradation. Keep away from heat, sparks, open flames, and incompatible materials such as bases, alcohols, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 97.0% (Area %)
Water Content (KF)	≤ 0.5%

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