Description

Spiro[2.2]Pentanecarboxylic Acid, 2-Methylene-, Ethyl Ester (9Ci) is a specialized spirocyclic organic ester building block of significant interest in advanced synthetic chemistry. Its unique, highly strained bicyclic structure makes it a valuable precursor for constructing complex molecular architectures, particularly in pharmaceutical and agrochemical research. This compound is primarily sought by R&D chemists and process development scientists working on novel active ingredients, fine chemicals, and material science applications where its rigid framework can impart specific steric and electronic properties.

Application

• Pharmaceutical Intermediate: A key building block for synthesizing novel drug candidates, especially those requiring complex, three-dimensional spirocyclic cores to modulate biological activity and pharmacokinetic properties.
• Agrochemical Synthesis: Used in the research and development of new pesticides and herbicides, where its unique structure can contribute to novel modes of action and improved environmental profiles.
• Material Science Research: Serves as a monomer or cross-linking agent in the development of advanced polymers with specific thermal or mechanical properties derived from its strained ring system.
• Ligand and Catalyst Development: Employed in the synthesis of specialized chiral or sterically hindered ligands for asymmetric catalysis and organometallic chemistry.
• Fine Chemical Production: Acts as a high-value intermediate in the multi-step synthesis of complex fragrance ingredients, dyes, and other specialty chemicals.

Basic Information

Product Name	Spiro[2.2]Pentanecarboxylic Acid, 2-Methylene-, Ethyl Ester (9Ci)
CAS No.	138469-28-0
Molecular Formula	C9H12O2
Molecular Weight	152.19 g/mol
Synonyms	Ethyl 2-Methylenespiro[2.2]pentane-1-carboxylate; 2-Methylenespiro[2.2]pentane-1-carboxylic Acid Ethyl Ester; Spiro[2.2]pentane-1-carboxylic acid, 2-methylene-, ethyl ester; Ethyl 2-methylidene-1-spiro[2.2]pentanecarboxylate
EINECS	Contact for details

Quality Control

Our Spiro[2.2]Pentanecarboxylic Acid, 2-Methylene-, Ethyl Ester (9Ci) is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity for research and development applications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key analytical parameters. Our quality systems are designed to support cGMP and ISO-aligned manufacturing for customers requiring material for advanced regulatory filings.

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 flame. For long-term storage, consider maintaining under an inert atmosphere to preserve stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC/HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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