Description

3,7-Dimethyl-9-(2,6,6-Trimethyl-2-Cyclohexen-1-Ylidene)-1-[(Trimethylsilyl)Oxy]-3,5,7-Nonatriene CAS NO 16729-20-7 is a specialized organosilicon derivative of a carotenoid-like structure, serving as a key protected intermediate in advanced organic synthesis. This compound is valued for its role in constructing complex molecular frameworks where the trimethylsilyl (TMS) group provides essential stability and reactivity control. It is primarily sought by research institutions and fine chemical manufacturers engaged in the development of novel pharmaceuticals, agrochemicals, and high-value specialty chemicals.

Application

• Pharmaceutical Intermediate: Used in the synthesis of retinoid analogs, vitamin A derivatives, and other bioactive molecules targeting nuclear receptors.
• Advanced Organic Synthesis: Serves as a key building block for constructing polyene chains and complex terpenoid structures in research and development.
• Agrochemical Research: Employed in the development of novel plant growth regulators and pest control agents with specific structural motifs.
• Material Science Precursor: Investigated for the creation of organic semiconductors and light-harvesting materials due to its extended conjugated system.
• Flavor & Fragrance Chemistry: Acts as an intermediate for synthesizing high-value aroma chemicals with specific woody or amber notes.
• Academic & Industrial R&D: A critical reagent for methodological studies in organometallic chemistry and new coupling reaction development.

Basic Information

Product Name	3,7-Dimethyl-9-(2,6,6-Trimethyl-2-Cyclohexen-1-Ylidene)-1-[(Trimethylsilyl)Oxy]-3,5,7-Nonatriene
CAS No.	16729-20-7
Molecular Formula	C23H40OSi
Molecular Weight	360.65 g/mol
Synonyms	1-[(Trimethylsilyl)oxy]-3,7-dimethyl-9-(2,6,6-trimethyl-2-cyclohexen-1-ylidene)-3,5,7-nonatriene; (3E,5E,7E)-1-[(Trimethylsilyl)oxy]-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3,5,7-nonatriene; TMS Ether of a Retinoid Derivative; Silyl Enol Ether of a C23 Isoprenoid; 1-(Trimethylsiloxy)polyene derivative; (all-E)-1-(Trimethylsiloxy)-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraene (related isomer); Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our production of 3,7-Dimethyl-9-(2,6,6-Trimethyl-2-Cyclohexen-1-Ylidene)-1-[(Trimethylsilyl)Oxy]-3,5,7-Nonatriene adheres to stringent in-process controls to ensure batch-to-batch consistency and high chemical purity. Each lot is fully characterized using advanced analytical techniques including NMR, HPLC, and GC-MS. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided and can be tailored to meet specific customer or regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C or as specified on the label or COA. Due to its hygroscopic (moisture-sensitive) nature, containers should be kept sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to orange viscous liquid or solid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0% (Typical 97-99%)
Water Content (KF)	≤ 0.5%

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