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HONGKUN / PRODUCT DIRECTORY

4′-(Bromomethyl)-2-cyanobiphenyl | CAS 114772-54-2

A biphenyl nitrile bearing a benzylic bromide coupling site, Br-OTBN appears in published olmesartan medoxomil chemistry where side-chain identity and separation from the methyl precursor matter during qualification.

CAS114772-54-2
Molecular formulaC14H10BrN

Product overview

The benzylic bromomethyl group gives Br-OTBN a direct substitution site while the ortho nitrile remains on the biphenyl framework. It is the activated side-chain stage following methyl precursor OTBN. Confirm bromine placement, nitrile position and analytical separation of any relevant residual methyl precursor.

Chemical identity

Chemical name
4′-(Bromomethyl)-2-cyanobiphenyl
CAS number
114772-54-2
Molecular formula
C14H10BrN

Application context

Br-OTBN supplies the biphenyl framework and a benzylic coupling site in a reported olmesartan medoxomil route. It follows the methyl precursor OTBN and precedes downstream fragment attachment. Where OTBN is used in the selected preparation, confirm its chromatographic separation and agree a residual-precursor criterion suited to the receiving coupling.

Chemistry and synthetic role

The bromomethyl group is attached at the para position of one biphenyl ring; the nitrile occupies the ortho position of the other. The benzylic bromide provides the substitution site while the biphenyl nitrile forms the retained framework.

Quality review

Verify the benzylic bromide structure

Confirm that bromine is on the methyl side chain and that the nitrile occupies the specified ortho position. Use structural identity evidence alongside the CAS reference.

Resolve the methyl precursor

Where the manufacturing route starts from OTBN, ask whether the chromatographic method separates it from Br-OTBN and agree any applicable limit.

Match moisture handling to the selected grade

Confirm moisture-control, packaging and opening requirements using the current SDS and handling guidance for the selected material.

Preparing a specification

Specify CAS 114772-54-2, the full substitution pattern, the chromatographic method and any route-relevant OTBN limit. Agree the assay basis and water criteria required for dosing and qualification.

Packaging and storage

Agree packaging, net weight and transport arrangements for the selected grade, quantity and destination. Confirm storage and handling conditions using the current SDS for the proposed material.

Documentation

Request a specification and batch COA with the identification method and related-substance method. Where OTBN control is required, confirm availability of a representative chromatogram. Obtain the actual supplier’s SDS and confirm handling recommendations for the proposed package.

Procurement questions

Is Br-OTBN an aryl bromide?

No. Its bromine is on a benzylic bromomethyl group; it is not bonded directly to the aromatic ring.

Can the OTBN and Br-OTBN names be used interchangeably?

No. OTBN has a methyl group, whereas Br-OTBN has a bromomethyl group and a different reaction role and CAS number.

When should residual OTBN be included in the specification?

When it is relevant to the selected preparation or receiving coupling. Confirm method resolution and agree an acceptance limit.

Technical sources
  1. PubChem CID 1501912 — structure propertiesPubChem / NCBI
  2. PubChem CID 1501912 — CAS and synonymsPubChem / NCBI
  3. 4′-Bromomethyl-2-cyanobiphenyl, B1806TCI
  4. WO2006029056A1 — Preparation of olmesartan medoxomilPatent applicant via Google Patents
  5. WO2003106406A1 — Process for producing 4′-bromomethyl-2-cyanobiphenylSumika Fine Chemicals / patent via Google Patents