Description

Spiro[5.5]Undeca-7,9-Dien-1-One, 5-Methyl- (9Ci) is a specialized spirocyclic organic compound with the CAS registry number 743353-70-0. This compound serves as a valuable advanced intermediate or building block in sophisticated organic synthesis, particularly for the development of novel chemical entities. It is primarily sought by pharmaceutical R&D and fine chemical sectors for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel active pharmaceutical ingredients (APIs) and drug candidates, particularly those requiring complex spirocyclic frameworks.
• Agrochemical Research: Used in the development of new generation pesticides and herbicides where its unique structure can contribute to specific biological activity.
• Material Science: Serves as a precursor or monomer in the research of advanced polymers and organic electronic materials.
• Academic & Industrial R&D: Employed in chemical research laboratories for methodological studies, catalysis development, and the exploration of new synthetic pathways.
• Flavor & Fragrance Industry: Potential use as an intermediate for synthesizing complex odorants and flavoring agents with unique organoleptic properties.

Basic Information

Product Name	Spiro[5.5]Undeca-7,9-Dien-1-One, 5-Methyl- (9Ci)
CAS No.	743353-70-0
Molecular Formula	C12H16O
Molecular Weight	176.26 g/mol
Synonyms	5-Methylspiro[5.5]undeca-7,9-dien-1-one; 5-Methylspiro[5.5]undeca-7,9-diene-1-one; Spiro[5.5]undeca-7,9-dien-1-one, 5-methyl-; 743353-70-0; 5-Methyl-1-oxaspiro[5.5]undeca-7,9-diene; 5-Methylspiro[5.5]undec-7-en-9-yne-1-one (related structure); AS-641/40238055; ZINC000644213529
EINECS	Contact for details

Quality Control

Our production of Spiro[5.5]Undeca-7,9-Dien-1-One, 5-Methyl- (9Ci) adheres to stringent internal quality standards to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical characterization, including HPLC/GC for purity and NMR/IR for structural confirmation. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profiles is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (typically 15-25°C). Keep away from incompatible materials such as strong oxidizing agents. For long-term storage, consider an inert atmosphere to preserve stability.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC/GC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 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.