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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Ethyl 7-bromo-2,2-dimethylheptanoate | CAS 123469-92-1

A terminal bromo ester used in published bempedoic acid chemistry, combining a reactive primary bromide with a preassembled gem-dimethyl carboxylate fragment for construction of the extended carbon skeleton.

CAS123469-92-1
Molecular formulaC11H21BrO2
Molecular weight265.19 g/mol

Product overview

The two ends of this molecule have different synthetic jobs. Its primary bromide provides an attachment point for chain construction, while the ethyl ester carries a carboxyl group through subsequent transformations. Two methyl groups already occupy the carbon adjacent to the ester. This arrangement appears in published bempedoic acid routes and makes the exact chain length and substitution pattern central to identification. Qualification should distinguish the desired monobrominated ester from residual dibromopentane, unreacted ester starting material and higher-boiling coupled products where the manufacturing route makes these relevant.

Chemical identity

Chemical name
Ethyl 7-bromo-2,2-dimethylheptanoate
CAS number
123469-92-1
Molecular formula
C11H21BrO2
Molecular weight
265.19 g/mol

Application context

Published bempedoic acid synthesis uses this fragment to build the long aliphatic framework while retaining the terminal ester functionality. The bromomethyl end acts as the reactive site, and the gem-dimethyl unit is carried forward as part of the target skeleton. For route development, the useful specification is therefore a component-resolved assay rather than a total bromine result. Agree how residual starting materials and coupled by-products will be measured, and request a chromatogram capable of showing less volatile components. Water and solvent carryover should be assessed against the next transformation and its charging basis.

Chemistry and synthetic role

A primary alkyl bromide and an ethyl ester are separated by a five-carbon methylene segment; the ester α-carbon bears two methyl groups and no hydrogen.

Quality review

Resolve residual dibromopentane

Specify a method that separates the desired ester from 1,5-dibromopentane when relevant to the selected route.

Review coupled by-products

Agree a chromatographic window and reporting threshold covering higher-boiling coupled material.

Define ester and water basis

Confirm the ethyl ester identity, assay calculation and water result for the next process step.

Preparing a specification

Specify the ethyl ester, CAS 123469-92-1, a component-resolved assay and route-relevant limits for dibromopentane, coupled products, water and residual solvents.

Packaging and storage

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

Documentation

Request a batch COA, SDS and the analytical methods for the acceptance criteria below. Confirm which supporting chromatograms and identity data are available from the selected manufacturer.

Procurement questions

Why is total bromine insufficient?

It cannot distinguish the required monobrominated ester from other brominated compounds.

Should the chromatogram include late peaks?

Yes. A short GC run may not adequately describe less volatile route-related material.

Can the corresponding acid be substituted?

Only after route review; the free acid and ethyl ester have different process roles.

Technical sources
  1. PubChem CID 11265571NCBI / PubChem
  2. Preparation of ethyl 7-bromo-2,2-dimethylheptanoate — CN111675614AAstaTech Chengdu / patent publication
  3. Ketone compounds and compositions — US7119221B2Patent publication