Description

Cyclopentanecarboxylic Acid, 1-Methyl-3-(1-Methylethylidene)-, Ethyl Ester (9Ci) is a specialized organic ester compound with a unique bridged-ring structure, serving as a valuable intermediate in advanced chemical synthesis. Its molecular architecture makes it a critical building block for creating complex molecules with specific stereochemical and functional properties. This compound is essential for research and development chemists in the pharmaceutical, agrochemical, and fragrance industries who require high-purity, structurally defined intermediates for novel product development.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring complex carbocyclic frameworks.
• Agrochemical Synthesis: Used in the development of novel pesticides and herbicides, where its structure can contribute to specific biological activity.
• Fragrance & Flavor Ingredient: Acts as a starting material for synthesizing esters and lactones with unique olfactory profiles for high-end perfumery.
• Material Science Research: Serves as a monomer or cross-linking agent in polymer research for creating specialty resins and coatings with tailored properties.
• Organic Synthesis Building Block: A versatile reagent for constructing complex natural product analogs and other structurally challenging organic molecules in academic and industrial R&D.
• Catalyst & Ligand Development: Potential precursor for chiral ligands or organocatalysts used in asymmetric synthesis.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 1-Methyl-3-(1-Methylethylidene)-, Ethyl Ester (9Ci)
CAS No.	656235-99-3
Molecular Formula	C12H20O2
Molecular Weight	196.29 g/mol
Synonyms	Ethyl 1-Methyl-3-(1-methylethylidene)cyclopentanecarboxylate; 1-Methyl-3-(1-methylethylidene)cyclopentanecarboxylic Acid Ethyl Ester; Ethyl 1-Methyl-3-(propan-2-ylidene)cyclopentane-1-carboxylate; 3-Isopropylidene-1-methylcyclopentanecarboxylic Acid Ethyl Ester; Cyclopentanecarboxylic acid, 1-methyl-3-(1-methylethylidene)-, ethyl ester; Ethyl 3-isopropylidene-1-methylcyclopentane-1-carboxylate
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 1-Methyl-3-(1-Methylethylidene)-, Ethyl Ester (9Ci) is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high chemical purity and structural identity. Certificates of Analysis (COA) detailing purity, impurities, and physical characteristics are provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider under an inert atmosphere to maintain product integrity.

Specification

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