Description

Methanesulfonic Acid (R)-2-Methyl-4-Oxo-3-(2-Propynyl)-2-Cyclopentenyl Ester is a specialized chiral ester derivative of methanesulfonic acid, serving as a high-value synthetic intermediate. This compound is critical for enabling precise stereochemical control in advanced organic synthesis, offering a unique reactive handle for constructing complex molecular architectures. It is primarily sought by research and development teams in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of chiral drug candidates, particularly in prostaglandin and terpenoid-related pathways.
• Agrochemical Synthesis: Used in the research and development of advanced pesticides and herbicides with specific stereochemical requirements.
• Chemical Research: Valuable reagent in academic and industrial laboratories for methodological studies in asymmetric synthesis and ester chemistry.
• Fine Chemical Production: Intermediate for manufacturing specialty chemicals, flavors, and fragrances where the specific (R)-enantiomer structure is essential.

Basic Information

Product Name	Methanesulfonic Acid (R)-2-Methyl-4-Oxo-3-(2-Propynyl)-2-Cyclopentenyl Ester
CAS No.	95413-30-2
Molecular Formula	C11H14O4S
Molecular Weight	242.29 g/mol
Synonyms	(R)-2-Methyl-4-oxo-3-(2-propynyl)-2-cyclopenten-1-yl methanesulfonate; (R)-Allethrolone methanesulfonate ester; (1R)-2-Methyl-4-oxo-3-(prop-2-yn-1-yl)cyclopent-2-en-1-yl methanesulfonate; Allethrin intermediate; Pyrethroid acid ester intermediate; (R)-MSP Ester; (R)-Cyclopentenyl Methanesulfonate
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality management systems. Each batch is characterized using advanced analytical techniques including HPLC, GC, and chiral analysis to ensure high enantiomeric purity and chemical identity. Certificates of Analysis (COA) with detailed chromatographic data are provided for every shipment, supporting your regulatory and R&D documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture.

Specification

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

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