Description

3,4-Diaminophenylboronic Acid, Pinacol Ester is a high-value, multifunctional boronic ester derivative that serves as a critical building block in advanced organic synthesis. Its core value lies in the dual functionality of the protected boronic acid group and the two adjacent amine groups, enabling precise cross-coupling reactions and subsequent derivatization. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and materials science industries, particularly for developing active pharmaceutical ingredients (APIs), functional polymers, and complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key precursor in Suzuki-Miyaura cross-coupling reactions for the synthesis of novel biaryl compounds and heterocycles with potential therapeutic activity.
• Agrochemical Synthesis: Used in creating advanced crop protection agents and herbicides that require specific, complex boronic acid intermediates.
• Materials Science & OLED Development: Serves as a monomer or building block for constructing organic semiconductors, light-emitting materials, and metal-organic frameworks (MOFs).
• Chemical Biology & Probe Development: Utilized in the synthesis of molecular probes and sensors that leverage boronic acid chemistry for saccharide or analyte detection.
• Polymer Chemistry: Acts as a functional monomer for introducing boronate ester linkages or amine-reactive sites into specialty polymers and coatings.
• Academic & Contract Research: A valuable reagent for methodological development in organic chemistry and for producing custom compounds in research laboratories.

Basic Information

Product Name	3,4-Diaminophenylboronic Acid, Pinacol Ester
CAS No.	851883-08-4
Molecular Formula	C12H19BN2O2
Molecular Weight	234.11 g/mol
Synonyms	3,4-Diaminobenzeneboronic Acid Pinacol Ester; 4,5-Diaminophenylboronic Acid Pinacol Ester; 2-(3,4-Diaminophenyl)-5,5-dimethyl-1,3,2-dioxaborinane; 3,4-Diaminophenylboronic Acid Pinanediol Ester (common alternative); 3,4-Diaminophenyl-B(pin); B-(3,4-Diaminophenyl)-5,5-dimethyl-1,3,2-dioxaborinane; 1,2-Benzenediamine, 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-
EINECS	Contact for details

Quality Control

Our 3,4-Diaminophenylboronic Acid, Pinacol Ester is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques, including HPLC, NMR, and GC-MS, for comprehensive characterization and impurity profiling. Certificates of Analysis (COA) detailing purity, identity, and specific test results are provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and should be handled under an inert atmosphere (e.g., nitrogen or argon) for long-term storage and when opening the container to prevent degradation.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
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.