Description

1-(4-(4,4,5,5-Tetramethyl-1,3,2-Dioxaborolan-2-Yl)-1H-Pyrazol-1-Yl)Butan-2-One is a high-purity, advanced pharmaceutical intermediate featuring a pyrazole core and a pinacol boronate ester functional group. This compound is specifically engineered for use in Suzuki-Miyaura cross-coupling reactions, a cornerstone methodology in modern synthetic chemistry for carbon-carbon bond formation. It is an essential building block for research and development chemists in the pharmaceutical, agrochemical, and material science industries who require reliable, high-quality precursors for constructing complex molecular architectures. The CAS number for this compound is 1022092-31-4.

Application

This versatile boronate ester is a key reagent in sophisticated organic synthesis, primarily serving as a coupling partner. Its applications include:

• Pharmaceutical Intermediate: Critical for the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, particularly those containing heterocyclic pyrazole motifs.
• Agrochemical Synthesis: Used in the research and production of novel herbicides, fungicides, and insecticides that require specific biaryl or heteroaryl structures.
• Material Science Research: Employed in the development of organic electronic materials, such as organic light-emitting diodes (OLEDs) and semiconductors, where precise molecular conjugation is needed.
• Chemical Biology & Medicinal Chemistry: Serves as a valuable probe or building block in the discovery of enzyme inhibitors and other biologically active molecules.
• Catalyst & Ligand Development: Can be utilized to create novel ligands for transition metal catalysts used in asymmetric synthesis.
• Custom Synthesis & Contract Manufacturing: A fundamental starting material for custom synthesis projects and scale-up processes in fine chemical production.

Basic Information

Product Name	1-(4-(4,4,5,5-Tetramethyl-1,3,2-Dioxaborolan-2-Yl)-1H-Pyrazol-1-Yl)Butan-2-One
CAS No.	1022092-31-4
Molecular Formula	C₁₃H₂₁BN₂O₃
Molecular Weight	264.13 g/mol
Synonyms	2-Butanone, 1-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]-; 1-(4-(Pinacolatoboron)-1H-pyrazol-1-yl)butan-2-one; 4-(Pinacolatoboron)-1H-pyrazole-1-butane-2-one; 1-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)butan-2-one; Pyrazole boronic acid pinacol ester derivative; Pinacol (1-(2-oxobutyl)-1H-pyrazol-4-yl)boronate
EINECS	Contact for details

Quality Control

Our 1-(4-(4,4,5,5-Tetramethyl-1,3,2-Dioxaborolan-2-Yl)-1H-Pyrazol-1-Yl)Butan-2-One is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC, NMR, and mass spectrometry, to ensure high chemical purity and structural identity. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with each shipment to guarantee batch-to-batch consistency and support your regulatory and R&D documentation needs.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%
Single Unknown Impurity (HPLC)	≤ 0.5%
Total Impurities (HPLC)	≤ 3.0%

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