4-Bromo-1H-indazole

4-Bromo-1H-indazole is a brominated fused nitrogen heterocycle used to construct substituted indazole scaffolds. Its aryl bromide provides a carbon-coupling handle, while the unprotected indazole nitrogen permits N-substitution or temporary protection. The two features allow changes at the fused aromatic ring and at nitrogen without rebuilding the bicyclic framework.

The bromine occupies the 4-position, distinguishing this material from other bromoindazole regioisomers with different downstream connection points. The selected 1H form has no preinstalled N-alkyl group, leaving nitrogen chemistry available to the route designer. Coupling and N-functionalization sequences can therefore generate structurally varied products from the same starting scaffold, particularly in heterocycle-focused medicinal-chemistry synthesis.

Typical Applications

• Aryl- and heteroaryl-substituted indazoles: Used as the brominated partner in catalytic coupling routes that install a carbon substituent at indazole C4, extending the fused ring into larger molecular structures.
• N-Functionalized indazole intermediates: Used in N-alkylation or N-protection sequences to prepare derivatives with a defined nitrogen substituent before or after subsequent transformation of the aromatic bromine.

Specifications

Specifications describe the standard grade. Tolerance, test method and documentation package are confirmed per order.