Description

Phosphonothioic Acid, Methyl-, o-Cyclopentyl Ester, (S)- (9Ci) is a chiral organophosphorus compound characterized by its specific stereochemistry and phosphonothioate ester functional group. This compound is a high-value intermediate of significant interest in advanced chemical synthesis, particularly for the development of chiral ligands and biologically active molecules. It serves the needs of research institutions and industrial R&D departments focused on asymmetric catalysis, agrochemical research, and pharmaceutical development.

Application

• Chiral Ligand Synthesis: A key building block for creating novel phosphorus-based ligands used in asymmetric hydrogenation and other catalytic processes.
• Agrochemical Intermediates: Used in the research and development of advanced insecticides and herbicides with specific stereochemical requirements.
• Pharmaceutical Research: Serves as a sophisticated synthon for constructing complex molecules in medicinal chemistry programs.
• Chemical Biology Probes: Utilized in the design of enzyme inhibitors and molecular probes that target specific biological pathways.
• Material Science Research: Investigated for potential use in the synthesis of specialized polymers and functional materials.

Basic Information

Product Name	Phosphonothioic Acid, Methyl-, o-Cyclopentyl Ester, (S)- (9Ci)
CAS No.	140851-37-2
Molecular Formula	C6H13O2PS
Molecular Weight	180.21 g/mol
Synonyms	(S)-Methyl o-cyclopentyl phosphonothioate; (S)-o-Cyclopentyl Methylphosphonothioate; Methyl (S)-o-cyclopentyl phosphonothioate; (S)-(-)-Methyl o-cyclopentyl phosphonothioate; (S)-Configuration Phosphonothioic Acid Methyl o-cyclopentyl Ester; Methyl (o-cyclopentyl)phosphonothioate, (S)-; (S)-Methyl Cyclopentylphosphonothioate
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high chemical purity. Each lot is characterized using advanced analytical techniques including chiral HPLC, 31P NMR, and 1H NMR to confirm identity, enantiomeric excess, and purity. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). This material is moisture-sensitive; keep the container tightly sealed under an inert atmosphere such as nitrogen or argon to maintain stability and prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Identification (31P NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Enantiomeric Excess (Chiral HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%

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