Description

2-Cyclopenten-1-One, 4-Methyl-5-(2-Methylpropylidene)-, (4S,5E)- (9Ci) is a high-purity, stereochemically defined cyclopentenone derivative that serves as a valuable chiral building block and intermediate in advanced organic synthesis. Its specific stereochemistry and functional groups make it a critical precursor for the development of complex molecules with targeted biological activity. This compound is essential for research and development chemists in the pharmaceutical, agrochemical, and fine chemical industries seeking to create novel compounds with precise three-dimensional structures.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of active pharmaceutical ingredients (APIs), particularly in the development of prostaglandin analogs, terpenoid-derived drugs, and other bioactive molecules.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides where specific stereochemistry influences biological efficacy and environmental profile.
• Fine Chemical & Flavor/Fragrance Precursor: Serves as a starting material for the synthesis of complex natural product analogs and high-value aroma chemicals.
• Academic & Industrial R&D: A valuable tool for methodological development in asymmetric synthesis, catalysis, and total synthesis projects within university and corporate research laboratories.
• Material Science Research: Investigated as a monomer or functional additive in the development of specialized polymers with unique optical or chemical properties.

Basic Information

Product Name	2-Cyclopenten-1-One, 4-Methyl-5-(2-Methylpropylidene)-, (4S,5E)- (9Ci)
CAS No.	600684-12-6
Molecular Formula	C10H14O
Molecular Weight	150.22 g/mol
Synonyms	(4S,5E)-4-Methyl-5-(2-methylpropylidene)cyclopent-2-en-1-one; (4S,5E)-4-Methyl-5-(2-methylpropylidene)-2-cyclopenten-1-one; (4S,5E)-4-Methyl-5-isobutylidenecyclopent-2-en-1-one; 4-Methyl-5-(2-methylpropylidene)-2-cyclopenten-1-one, (4S,5E)-; (S,E)-4-Methyl-5-(2-methylpropylidene)cyclopent-2-en-1-one; Chiral Cyclopentenone Derivative; CAS 600684-12-6
EINECS	Contact for details

Quality Control

Every batch of 2-Cyclopenten-1-One, 4-Methyl-5-(2-Methylpropylidene)-, (4S,5E)- (9Ci) is manufactured under strict quality management systems. Our products undergo rigorous analytical testing, including chiral HPLC and NMR, to ensure high chemical and enantiomeric purity and compliance with customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and chiral excess is provided with each 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 area at a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its light-sensitive nature, containers should be kept in opaque or amber glass, or stored in dark conditions.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Chiral Purity (Chiral HPLC)	≥ 98.0% ee
Water Content (KF)	≤ 0.5%

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