Description

Spiro[5.5]Undeca-3-One CAS NO 1890-25-1 is a specialized spirocyclic ketone compound, serving as a valuable and versatile building block in advanced organic synthesis. Its unique bridged bicyclic structure makes it a critical intermediate for constructing complex molecular architectures with precise three-dimensional control. This high-purity intermediate is essential for research and development chemists in the pharmaceutical, agrochemical, and material science industries, where it is used to develop novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of novel drug candidates, particularly in central nervous system (CNS) and anti-inflammatory therapeutic areas.
• Agrochemical Synthesis: Used in the development of advanced pesticides and herbicides, leveraging its spirocyclic framework for enhanced biological activity and stability.
• Material Science Research: Acts as a precursor for specialty polymers, liquid crystals, and organic electronic materials requiring rigid, three-dimensional components.
• Flavor & Fragrance Chemistry: Employed in the synthesis of complex musk and amber odorants due to its stable macrocyclic-like structural motif.
• Academic & R&D Laboratories: Serves as a standard or starting material for methodological development in organic chemistry and catalysis studies.
• Fine Chemical Production: Integral to multi-step synthetic routes for producing other high-value, spirocyclic fine chemicals and catalysts.

Basic Information

Product Name	Spiro[5.5]Undeca-3-One
CAS No.	1890-25-1
Molecular Formula	C11H18O
Molecular Weight	166.26 g/mol
Synonyms	Spiro[5.5]undecan-3-one; 3-Oxaspiro[5.5]undecane; 1,4-Dioxaspiro[4.5]decane, 2-methyl- (related derivatives); Spiro-5,5-undecan-3-one; 1890-25-1; Spirocyclic C11 ketone; Bicyclo[5.5.0]dodecan-3-one (incorrect but common search term)
EINECS	217-567-1

Quality Control

Our Spiro[5.5]Undeca-3-One is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing including HPLC for purity, GC for residual solvents, and spectroscopic identification (IR, NMR) to ensure identity and consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, confirming compliance with agreed specifications. Our quality commitment supports applications requiring high-purity intermediates for GMP and research purposes.

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). Keep away from strong oxidizing agents, strong acids, and strong bases. For long-term storage, consider an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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