Description

[4S,(-)]-4,4Aα,5,6-Tetrahydro-4β,7-Dimethylcyclopenta[C]Pyran-1(3H)-One CAS NO 4581-74-2 is a high-purity, chiral organic compound belonging to the cyclopentapyranone class. This specialized intermediate is valued for its defined stereochemistry and structural complexity, which are critical for synthesizing advanced molecules. It is primarily sought by research and development teams in the pharmaceutical and fine chemical industries for use in asymmetric synthesis and as a building block for novel active ingredients.

Application

• Pharmaceutical Intermediate: Serves as a key chiral building block in the synthesis of novel drug candidates, particularly in therapeutic areas requiring complex, stereochemically defined molecules.
• Asymmetric Synthesis: Utilized as a starting material or intermediate in catalytic asymmetric reactions to construct molecules with high enantiomeric purity.
• Fine Chemical Production: Employed in the manufacture of specialty chemicals, fragrances, and advanced materials where its unique fused-ring structure is advantageous.
• Academic & Industrial Research: Used in chemical research to explore new synthetic methodologies and to study structure-activity relationships (SAR).
• Process Development: Acts as a reference standard or intermediate in scaling up synthetic routes from laboratory to pilot plant scale.

Basic Information

Product Name	[4S,(-)]-4,4Aα,5,6-Tetrahydro-4β,7-Dimethylcyclopenta[C]Pyran-1(3H)-One
CAS No.	4581-74-2
Molecular Formula	C10H14O2
Molecular Weight	166.22 g/mol
Synonyms	(4S)-4,4aα,5,6-Tetrahydro-4β,7-dimethylcyclopenta[c]pyran-1(3H)-one; (-)-4,4aα,5,6-Tetrahydro-4β,7-dimethylcyclopenta[c]pyran-1(3H)-one; (4S)-4,4a,5,6-Tetrahydro-4,7-dimethylcyclopenta[c]pyran-1(3H)-one; 4S-(-)-Tetrahydrodimethylcyclopentapyranone; CAS 4581-74-2; 4S-Isomer of Tetrahydrodimethylcyclopentapyranone; (-)-Tetrahydro-4β,7-dimethylcyclopenta[c]pyran-1(3H)-one
EINECS	Contact for details

Quality Control

Our [4S,(-)]-4,4Aα,5,6-Tetrahydro-4β,7-Dimethylcyclopenta[C]Pyran-1(3H)-One is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity assay and impurity profiling, to ensure it meets the high standards required for research and synthesis. Certificates of Analysis (COA) detailing identity, purity, and chiral excess are provided to guarantee batch-to-batch consistency and traceability.

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 heat sources and incompatible materials. For long-term storage, consider inert atmosphere conditions to maintain optimal stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 98.0%
Chiral Purity (Chiral HPLC)	≥ 99.0% ee
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.