Description

8-Ethynylisoquinoline is a high-purity heterocyclic building block featuring an ethynyl substituent at the 8-position of the isoquinoline scaffold — a privileged structure in medicinal chemistry and materials science. It serves as a critical coupling partner in palladium- and copper-catalyzed reactions (e.g., Sonogashira, Click) for rapid assembly of complex bioactive molecules and functional organic materials. This compound is essential for pharmaceutical R&D laboratories, contract research organizations (CROs), and advanced materials developers seeking structurally precise, synthetically versatile intermediates. The compound is commercially available as 8-Ethynylisoquinoline CAS NO 1415559-62-4 to support traceable sourcing and regulatory documentation.

Application

• Key intermediate in the synthesis of kinase inhibitors and antitumor agents targeting Bcl-2, PI3K, and ALK pathways
• Building block for fluorescent probes and optoelectronic materials via alkyne–azide cycloaddition (CuAAC)
• Substrate in transition-metal-catalyzed C–H functionalization studies for library diversification
• Component in the preparation of isoquinoline-based metal–organic frameworks (MOFs) and porous polymers
• Tool compound for chemical biology applications, including target engagement assays and PROTAC linker development
• Starting material for radiolabeling (e.g., 11C or 18F) in PET tracer development

Basic Information

Product Name	8-Ethynylisoquinoline
CAS No.	1415559-62-4
Molecular Formula	C11H7N
Molecular Weight	169.18 g/mol
Synonyms	8-Ethynyl-1,2-dihydroisoquinoline; 8-Ethynyl-3,4-dihydroisoquinoline (tautomer); 8-Ethynyl-1H-isoquinolin-2-one (minor tautomer); 8-(Ethylnyl)isoquinoline; 8-Acetylenylisoquinoline; NSC 100257; AKOS BBS-000122253; STK 225224; Z1923218201; ISOQUINOLINE, 8-ETHYNYL-
EINECS	Not listed (not yet assigned)

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Each batch of 8-Ethynylisoquinoline is verified for identity, purity, and structural integrity using orthogonal analytical methods including HPLC, 1H NMR, and GC-MS. Certificates of Analysis (COA) are available upon request and include assay (≥98.0%), residual solvents, heavy metals (<10 ppm), and water content (<0.5%). All manufacturing adheres to ISO 9001-certified processes and supports GMP-aligned documentation for pharmaceutical clients.

Storage

Preserve in a tightly closed container, protected from light. Store under inert atmosphere (argon or nitrogen) at 15–25°C. Keep away from oxidizing agents and moisture. Handle in a well-ventilated area.

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Assay (HPLC)	≥98.0%
Identification (IR)	Conforms to reference standard
Identification (1H NMR)	Conforms to reference spectrum
Residue on Ignition	≤0.1%
Water (Karl Fischer)	≤0.5%
Heavy Metals	<10 ppm
Residual Solvents (GC)	Meets ICH Q3C guidelines

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