Description

3-Oxaspiro[5.5]Undecan-9-One is a high-purity, specialized spirocyclic ketone building block with the CAS registry number 1159280-53-1. This compound is valued for its unique bridged bicyclic structure, which serves as a critical intermediate in advanced organic synthesis and pharmaceutical research. It is primarily sought after by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and fine chemical industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key synthon for the development of novel active pharmaceutical ingredients (APIs), particularly those requiring complex spirocyclic or bridged ring systems.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides where specific stereochemistry and ring strain can influence biological activity.
• Fine Chemical Building Block: Employed in the synthesis of specialty chemicals, flavors, fragrances, and advanced materials requiring precise molecular frameworks.
• Academic & Industrial R&D: Serves as a valuable scaffold in medicinal chemistry for probing structure-activity relationships (SAR) and discovering new bioactive molecules.
• Ligand and Catalyst Development: Potential use in the design of novel chiral ligands or organocatalysts due to its rigid, three-dimensional structure.

Basic Information

Product Name	3-Oxaspiro[5.5]Undecan-9-One
CAS No.	1159280-53-1
Molecular Formula	C10H16O2
Molecular Weight	168.23 g/mol
Synonyms	3-Oxaspiro[5.5]undecan-9-one; 9-Oxaspiro[5.5]undecan-3-one; Spiro[5.5]undecane-3,9-dione (related); 1,4-Dioxaspiro[4.5]decane-8-one (isomeric); Oxaspiroketone; Contact for additional trade names and aliases.
EINECS	Contact for details

Quality Control

Our 3-Oxaspiro[5.5]Undecan-9-One is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC, GC, NMR, and mass spectrometry, to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with every shipment, confirming compliance with customer specifications and relevant industry standards for research and process chemistry.

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 strong oxidizing agents, strong bases, and sources of ignition. 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 structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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