Collection: Halogenated Heterocyclic Building Blocks

Halogenated Heterocyclic Building Blocks — encompasses heterocyclic ring compounds bearing halogen substituents (chlorine, bromine, iodine, or fluorine) at specific positions on the pyridine, pyrimidine, thiophene, or other heterocyclic rings. These halogen groups make those positions reactive sites for substitution and metal-coupling reactions.

Halogenated Heterocyclic Building Blocks are widely used by synthetic chemists as cross-coupling partners in reactions such as Suzuki, Negishi, or Buchwald-Hartwig to form carbon-carbon as well as carbon-heteroatom bonds on the heterocyclic framework. These building blocks are important starting materials in medicinal chemistry, agrochemical, and heterocycle-based materials development research.

Example products in this collection: TCI I0750 19658-77-6 1-Iodoisoquinoline, TCI B5515 132244-31-6 5-Bromobenzoxazole, TCI I0771 2033-45-6 4-Iodo-3,5-dimethylpyrazole, TCI B5517 200878-50-8 2-Bromo-7-methoxy-9H-carbazole, TCI I0786 75092-30-7 4-Iodo-1-methylpyrazole-5-carboxylic Acid, TCI B5523 17347-32-9 6-Bromobenzo[b]thiophene, TCI I0812 71759-89-2 4-Iodo-1H-imidazole, TCI B5584 573675-25-9 5-Bromo-2-cyano-3-nitropyridine.

Pay attention to the position of the halogen substituent on the ring (regiochemistry), the purity relative to other positional isomers, and the relative reactivity of the halogens (iodine is more reactive than chlorine) to select the one suitable for the intended coupling reaction. All products are genuine Tokyo Chemical Industry (TCI) Japan products, with purity, packaging, and storage conditions listed on each item's page.

Other parallel categories under Heterocyclic Building Blocks, often used together in a single laboratory workflow:

• Non-Halogenated Heterocyclic Building Blocks
• Non-Heterocyclic Building Blocks
• Fluorinated Building Blocks
• Specialized Building Blocks for Drug Discovery

Back to Heterocyclic Building Blocks. For large-volume procurement, special packaging, or specific grades, contact the AMI Scientific team — the official TCI Japan distributor in Indonesia — for availability checks and lead times directly from Japan.