Description

3-(Ethylsulfonyl)Phenylboronic Acid Pinacol Ester is a high-purity, synthetically valuable organoboron building block. This compound is essential for modern cross-coupling reactions, enabling the efficient construction of complex molecular architectures. It is primarily utilized by research chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials industries for drug discovery and fine chemical synthesis.

Application

• Suzuki-Miyaura Cross-Coupling Reactions: A key reagent for forming carbon-carbon bonds to create biaryl structures, a common motif in active pharmaceutical ingredients (APIs).
• Pharmaceutical Intermediate Synthesis: Used in the research and development of novel drug candidates, particularly those containing functionalized biphenyl or heterobiaryl units.
• Agrochemical Research: Serves as a building block for developing new herbicides, fungicides, and insecticides with improved efficacy.
• Material Science & OLED Development: Employed in the synthesis of organic semiconductors, ligands for catalysts, and emissive layers for electronic devices.
• Chemical Biology & Probe Development: Useful for creating molecular probes and labeled compounds for biochemical and diagnostic applications.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs and fine chemical producers for scale-up and commercial production under cGMP conditions.

Basic Information

Product Name	3-(Ethylsulfonyl)Phenylboronic Acid Pinacol Ester
CAS No.	2096331-73-4
Molecular Formula	C14H21BO4S
Molecular Weight	296.19 g/mol
Synonyms	3-(Ethylsulfonyl)benzeneboronic acid pinacol ester; [3-(Ethylsulfonyl)phenyl]boronic acid pinacol ester; 3-(Ethanesulfonyl)phenylboronic acid pinacol ester; (3-Ethylsulfonylphenyl)boronic acid pinacol ester; Pinacol 3-(Ethylsulfonyl)phenylboronate; B-[3-(Ethylsulfonyl)phenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
EINECS	Contact for details

Quality Control

Our 3-(Ethylsulfonyl)Phenylboronic Acid Pinacol Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and mass spectrometry, to ensure high chemical purity and identity confirmation. Certificates of Analysis (COA) with lot-specific data are provided to guarantee traceability and batch-to-batch consistency, meeting the stringent requirements of research and development applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (HPLC)	Conforms
Identification (NMR)	Conforms
Purity (HPLC)	≥ 97.0%
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.