AD-mix

AD-mix

AD-mix in organic chemistry is a commercially available mixture of reagents for performing amongst others the Sharpless asymmetric dihydroxylation of alkenes. The mix is available in two variations, "AD-mix α" and "AD-mix β" following ingredient lists published by Sharpless. [Note|Sharpless1992 Sharpless, K. B., "et al." "J. Org. Chem." 1992, "57", 2768-2771. (DOI|10.1021/jo00036a003)] As such it is used in research laboratories.

The mixes contain:

* Potassium osmate K2OsO2(OH)4 as the source of Osmium tetroxide
* Potassium ferricyanide K3Fe(CN)6, which is the re-oxidant in the catalytic cycle
* Potassium carbonate
* Chiral ligands (see below)

:

:In AD-mix α (DHQ)2PHAL (top) is the phthalazine adduct with dihydroquinine.

:

:In AD-mix β; (DHQD)2PHAL is the phthalazine adduct with dihydroquinidine.

ee also

* Reagent
* Sharpless asymmetric dihydroxylation

References

External links

* "Catalytic Asymmetric Dihydroxylation of Alkenes" at Imperial College London [http://www.ch.ic.ac.uk/local/organic//0405Expt7.pdf Link]


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