Description

4-Chlorobenzensulfonic But-3-Ynyl Ester is a specialized organic sulfonate ester building block of significant interest in advanced synthetic chemistry. Its unique molecular structure, featuring both a sulfonate ester group and an alkyne moiety, makes it a valuable precursor for constructing complex molecules via cross-coupling and click chemistry reactions. This high-purity intermediate is essential for researchers and process chemists in the pharmaceutical and agrochemical industries developing novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Serves as a key synthon in the research and development of new drug candidates, particularly for creating sulfonamide-linked structures.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and insecticides where the chlorobenzene and sulfonate groups impart specific biological activity.
• Material Science: Acts as a monomer or cross-linking agent in the synthesis of specialty polymers and functional materials with tailored properties.
• Chemical Research: A versatile building block for academic and industrial R&D in organic synthesis, enabling novel carbon-sulfur and carbon-carbon bond formations.
• Ligand and Catalyst Development: Utilized for preparing specialized ligands and organometallic complexes used in catalytic processes.

Basic Information

Product Name	4-Chlorobenzensulfonic But-3-Ynyl Ester
CAS No.	877171-15-8
Molecular Formula	C10H9ClO3S
Molecular Weight	244.69 g/mol
Synonyms	But-3-yn-1-yl 4-chlorobenzenesulfonate; 4-Chlorobenzenesulfonic Acid But-3-ynyl Ester; 1-Butyn-4-yl p-Chlorobenzenesulfonate; p-Chlorobenzenesulfonyloxybutyne; 877171-15-8; But-3-ynyl 4-chlorobenzene-1-sulfonate
EINECS	Contact for details

Quality Control

Our 4-Chlorobenzensulfonic But-3-Ynyl Ester is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC, GC, NMR, and IR spectroscopy, to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with every shipment, confirming compliance with agreed specifications. Our quality commitment supports applications requiring high-purity intermediates under cGMP and ISO 9001 guidelines.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere (e.g., nitrogen or argon) in its original packaging to prevent degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Water Content (KF)	≤ 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.