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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Magnesium tert-butoxide | CAS 32149-57-8

A magnesium dialkoxide base used in published tenofovir synthesis, where active alkoxide content and exposure to water matter more than magnesium content alone when qualifying the reagent.

CAS32149-57-8
Molecular formulaC8H18MgO2
Molecular weight170.53 g/mol

Product overview

Magnesium tert-butoxide contains two tert-butoxide units per magnesium in its formula representation. It is a metal alkoxide reagent, not a magnesium salt intended to supply a nutritional mineral. In synthetic use, the alkoxide component and its acid–base function are central to performance. Moisture can change the reagent’s composition, so a metal-content result does not by itself establish the amount of active alkoxide. Buyers should define the analytical basis, physical form and residual alcohol or solvent criteria around the process in which the reagent will be used.

Chemical identity

Chemical name
Magnesium tert-butoxide
CAS number
32149-57-8
Molecular formula
C8H18MgO2
Molecular weight
170.53 g/mol

Application context

Published tenofovir routes employ magnesium tert-butoxide in the conversion of hydroxypropyladenine with a phosphonomethylating partner, leading toward the phosphonate intermediate. In that context it functions as a process reagent; the magnesium atom is not the structural fragment sought in the final active ingredient. Qualification should consider active-base content and material history relevant to moisture exposure. Related magnesium species and residual tert-butanol can affect the relationship between gross weight and useful reagent quantity, so acceptance criteria should be linked to a suitable assay and the selected process.

Chemistry and synthetic role

The formula Mg[OC(CH3)3]2 describes a magnesium dialkoxide. Water-sensitive alkoxide functionality is distinct from a simple total-magnesium specification.

Quality review

Determine active alkoxide

Agree an assay that measures the chemically relevant base content.

Assess water-related change

Confirm moisture protection and how altered material is detected analytically.

Specify alcohol and solvent content

Account for residual tert-butanol and any carrier solvent in the reagent charge.

Preparing a specification

Request magnesium tert-butoxide by CAS, active-base assay and basis, solid or solution form, residual alcohol/solvent criteria and moisture-related acceptance tests.

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

Does magnesium assay establish activity?

It also counts magnesium in other forms and therefore cannot alone establish active alkoxide.

Why is exposure history relevant?

Water can consume alkoxide functionality and change composition.

Should a solution be compared directly with a solid grade?

Only after concentration, solvent and assay bases have been aligned.

Technical sources
  1. PubChem CID 12040442NCBI / PubChem
  2. Magnesium di-tert-butoxideSigma-Aldrich
  3. Magnesium tert-butoxide SDSSigma-Aldrich
  4. Process for the preparation of tenofovirPatent publication