Description

3-Ethyl-1-Methyl-4-(Tetramethyl-1,3,2-Dioxaborolan-2-Yl)-1H-Pyrazole is a high-value, organoboron building block essential for modern synthetic chemistry. This compound matters for its role as a key intermediate in cross-coupling reactions, enabling the efficient construction of complex molecular architectures. It is primarily needed by research scientists and process chemists in the pharmaceutical, agrochemical, and materials science industries for developing new active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A crucial building block in Suzuki-Miyaura cross-coupling reactions for synthesizing novel drug candidates and active pharmaceutical ingredients (APIs).
• Agrochemical Research: Used in the development of new pesticides, herbicides, and fungicides by facilitating the introduction of the pyrazole-boronate moiety.
• Materials Science: Serves as a precursor for creating organic electronic materials, such as OLED (Organic Light-Emitting Diode) emitters and charge transport materials.
• Chemical Synthesis: Enables the modular construction of complex heterocyclic compounds and functionalized aromatics in academic and industrial R&D settings.
• Ligand Synthesis: Can be utilized to prepare novel bidentate or polydentate ligands for catalysis and metal-organic frameworks (MOFs).

Basic Information

Item	Detail
Product Name	3-Ethyl-1-Methyl-4-(Tetramethyl-1,3,2-Dioxaborolan-2-Yl)-1H-Pyrazole
CAS No.	1619991-78-4
Molecular Formula	C12H23BN2O2
Molecular Weight	238.14 g/mol
Synonyms	1-Methyl-3-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole; 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1-methyl-3-ethyl-1H-pyrazole; 1-Methyl-3-ethyl-4-(tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazole; 3-Ethyl-1-methyl-1H-pyrazole-4-boronic acid pinacol ester; Pyrazole boronic ester pinacol; 1619991-78-4
EINECS	Contact for details

Quality Control

Our production of 3-Ethyl-1-Methyl-4-(Tetramethyl-1,3,2-Dioxaborolan-2-Yl)-1H-Pyrazole adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including NMR, HPLC, and GC analysis. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to support your quality assurance and regulatory compliance 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). This product is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere (e.g., nitrogen or argon) to prevent degradation. Keep away from heat and incompatible materials.

Specification

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

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