Description

4-Cyano-3-Ethylphenylboronic Acid Pinacol Ester is a high-purity, synthetically valuable boronic ester derivative, serving as a critical protected intermediate in modern organic synthesis. Its primary value lies in enabling precise carbon-carbon bond formation via Suzuki-Miyaura cross-coupling reactions, a cornerstone methodology for constructing complex molecular architectures. This compound is essential for researchers and process chemists in the pharmaceutical, agrochemical, and advanced materials sectors, where it is used to introduce functionalized aromatic scaffolds into target molecules.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, particularly those containing cyano and ethyl-substituted biphenyl cores.
• Agrochemical Synthesis: Used in the research and development of novel herbicides, fungicides, and insecticides requiring specific aromatic coupling steps.
• Material Science: Precursor for creating functional organic molecules used in organic light-emitting diodes (OLEDs), liquid crystals, and conductive polymers.
• Chemical Research: A versatile reagent in academic and industrial R&D for exploring new Suzuki-Miyaura coupling methodologies and constructing complex organic libraries.
• Ligand & Catalyst Development: Serves as a starting material for synthesizing specialized ligands and organometallic catalysts.

Basic Information

Product Name	4-Cyano-3-Ethylphenylboronic Acid Pinacol Ester
CAS No.	2121513-53-7
Molecular Formula	C15H20BNO2
Molecular Weight	257.14 g/mol
Synonyms	2-(4-Cyano-3-ethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; 3-Ethyl-4-cyanophenylboronic Acid Pinacol Ester; 4-Cyano-3-ethylbenzeneboronic Acid Pinacol Ester; (4-Cyano-3-ethylphenyl)boronic Acid Pinacol Ester; Pinacol (4-Cyano-3-ethylphenyl)boronate; Boronic Acid, B-(4-Cyano-3-ethylphenyl)-, 1,1-dimethylethyl Ester; CAS 2121513-53-7
EINECS	Contact for details

Quality Control

Our 4-Cyano-3-Ethylphenylboronic Acid Pinacol Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure high chemical purity and structural identity. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with every shipment to guarantee batch-to-batch consistency and traceability for your R&D and scale-up processes.

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 compound is hygroscopic (moisture-sensitive); keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥97.0% (Area %)
Water Content (KF)	≤0.5%

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