Description

4-Ethoxy-3-Ethylphenylboronic Acid Pinacol Ester is a high-purity, protected boronic acid derivative essential for modern synthetic chemistry. This compound serves as a critical building block in cross-coupling reactions, enabling the efficient construction of complex molecular architectures. It is primarily utilized by researchers and process chemists 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 between aryl halides and this boronic ester, widely used in pharmaceutical intermediate synthesis.
• Pharmaceutical Research & Development: Serves as a versatile building block for creating novel active pharmaceutical ingredients (APIs) and candidate drug molecules.
• Agrochemical Synthesis: Used in the development of new herbicides, fungicides, and insecticides with complex aromatic structures.
• Material Science: Employed in the synthesis of organic electronic materials, such as those used in OLEDs and semiconductors.
• Chemical Biology & Probe Development: Useful for creating molecular probes and labeled compounds for biochemical research.
• Fine Chemical and Specialty Chemical Production: Acts as a precursor for various high-value, complex aromatic compounds.

Basic Information

Product Name	4-Ethoxy-3-Ethylphenylboronic Acid Pinacol Ester
CAS No.	2121514-94-9
Molecular Formula	C₁₆H₂₅BO₃
Molecular Weight	276.18 g/mol
Synonyms	2-(4-Ethoxy-3-ethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; 4-Ethoxy-3-ethylbenzeneboronic acid pinacol ester; (4-Ethoxy-3-ethylphenyl)boronic acid pinacol ester; 3-Ethyl-4-ethoxyphenylboronic acid pinacol ester; Pinacol 4-ethoxy-3-ethylphenylboronate; Boronic acid, B-(4-ethoxy-3-ethylphenyl)-, 1,1-dimethylethyl ester (9CI); CAS 2121514-94-9
EINECS	Contact for details

Quality Control

Our 4-Ethoxy-3-Ethylphenylboronic Acid Pinacol Ester is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity suitable for research and scale-up applications. We provide comprehensive Certificates of Analysis (COA) with each batch, detailing purity, identity, and impurity profiles. Our quality systems are designed to meet the stringent requirements of cGMP and ISO standards for fine chemical production.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). The compound is moisture-sensitive; keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to maintain optimal purity and reactivity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥97.0% (Area %)
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.