Description

2-Ethynyl-4-Nitrobenzaldehyde is a versatile and highly functionalized aromatic aldehyde building block. This compound matters for its unique molecular architecture, combining a reactive aldehyde group, a nitro substituent, and an ethynyl moiety, enabling its use in advanced synthetic pathways. It is primarily needed by research chemists and process development scientists in the pharmaceutical, agrochemical, and materials science industries for constructing complex molecules, particularly in click chemistry, cross-coupling reactions, and the synthesis of novel heterocycles.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, especially those requiring complex aromatic scaffolds.
• Agrochemical Research: Used in the development of novel herbicides, fungicides, and plant growth regulators.
• Material Science: Serves as a monomer or cross-linking agent in the preparation of specialty polymers, conductive materials, and metal-organic frameworks (MOFs).
• Click Chemistry: The ethynyl group makes it an ideal substrate for copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions to create triazole-linked structures.
• Ligand Synthesis: Used to prepare sophisticated ligands for catalysis and metal complexation studies.
• Organic Synthesis Building Block: Employed in various name reactions, including Sonogashira coupling, Knoevenagel condensations, and reductive amination, to introduce functional complexity.

Basic Information

Product Name	2-Ethynyl-4-Nitrobenzaldehyde
CAS No.	179129-22-7
Molecular Formula	C9H5NO3
Molecular Weight	175.14 g/mol
Synonyms	4-Nitro-2-ethynylbenzaldehyde; 2-Ethynyl-4-nitrobenzaldehyde; 2-Ethynyl-4-nitrobenzenecarboxaldehyde; Benzaldehyde, 2-ethynyl-4-nitro-; (2-Ethynyl-4-nitrophenyl)methanone (tautomeric form); 4-Nitro-2-ethynylbenzenecarbaldehyde
EINECS	Contact for details

Quality Control

Our 2-Ethynyl-4-Nitrobenzaldehyde is produced under strict quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and FTIR, to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee compliance with your research and development requirements.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry place at 2-8°C or as specified on the label. This material is hygroscopic (moisture-sensitive) and easily oxidized; prolonged exposure to air, moisture, or light should be avoided to maintain stability.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
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.