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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

5-Bromo-2-fluoropyrimidine | CAS 62802-38-4

A mixed-halogen pyrimidine with separate C2 fluoride and C5 bromide handles, used in published routes that develop the two positions in sequence. Both halogens and their locations are central to incoming-material identity.

CAS62802-38-4
Molecular formulaC4H2BrFN2

Product overview

Fluorine sits at C2 between the two pyrimidine nitrogens, while bromine occupies C5. This differentiated pattern allows a route to use one position while preserving the other for later chemistry. Published medicinal-chemistry examples include displacement of C2 fluorine by an amine and carbon-bond construction at C5 with the fluoride retained. The purchasing specification should identify the unmodified mixed-halogen starting material. A generic bromofluoropyrimidine name or total halogen result does not establish the required arrangement. Combine structural identification with a chromatographic profile for relevant partially transformed pyrimidines, and align water, solvent and metal controls with the buyer’s selected reaction rather than a general reagent label.

Chemical identity

Chemical name
5-Bromo-2-fluoropyrimidine
CAS number
62802-38-4
Molecular formula
C4H2BrFN2

Application context

Aminopyrimidine patent routes use this compound to introduce an amine at C2 while retaining the bromine at C5. A different published sequence in IRE1 inhibitor research develops the C5 position first and keeps C2 fluorine for a later amination. These examples show how the mixed-halogen pattern supports staged diversification.

The intended first transformation should accompany an enquiry. Qualification can then address the intact starting structure, any relevant loss or replacement of either halogen and the analytical resolution needed for the selected intermediate programme.

Chemistry and synthetic role

C2–F and C5–Br are chemically and positionally distinct. Their different roles allow successive functionalisation under an appropriately selected reaction sequence.

Quality review

Verify both halogen positions

Confirm C2 fluorine and C5 bromine by structural analysis.

Review partially transformed species

Select relevant substituted or dehalogenated pyrimidines for chromatographic control.

Define the first-step specification

Set moisture, solvents and any metal tests against the chosen initial transformation.

Preparing a specification

Specify 5-bromo-2-fluoropyrimidine with both halogens intact, the positional identity method and chromatographic criteria. State whether C2 amination or C5 modification is the intended first step.

Packaging and storage

Packaging, closure and net weight are agreed for the selected grade, order quantity and destination. Confirm storage and transport requirements against the actual supplier SDS.

Documentation

Request a batch COA, specification, identity data and SDS. Confirm the availability of the analytical methods and any application-specific impurity results with the proposed supplier.

Procurement questions

Which halogen can be retained during amination?

Published C2 amination examples retain the C5 bromide.

Can C5 be modified before C2?

Published routes also illustrate C5 elaboration with C2 fluorine retained.

Is total fluorine sufficient for identity?

No. The required ring position and the intact bromide must also be established.

Technical sources
  1. 5-Bromo-2-fluoropyrimidine B3685TCI
  2. 5-Bromo-2-fluoropyrimidine SDSTCI
  3. Certain amino-pyrimidines, compositions thereof, and methods for their useEuropean Patent Office EP3127540A1
  4. IRE1 small molecule inhibitorsEuropean Patent Office EP4201924A1