Catalyst-controlled Wacker-type oxidation of homoallylic alcohols in the absence of protecting groups
Jessica R McCombs1, Brian W Michel, Matthew S Sigman
1University of Utah, Department of Chemistry, 315 S. 1400 E, Salt Lake City, Utah 84112, USA.
Abstract:
Homoallylic alcohols are oxidized to β-hydroxy ketones using a TBHP-mediated Pd-catalyzed Wacker-type oxidation. The use of a bidentate ligand, quinoline-2-oxazoline (Quinox), and TBHP((aq)) as the terminal oxidant provides good yields of the desired products with reaction times significantly reduced as compared to the Tsuji-Wacker oxidation. Additionally, bis- and tris-homoallylic alcohols are oxidized to provide cyclic peroxyketals, presumably via nucleophilic attack of the methyl ketone product.
Related Concept Videos
Oxidation of Alcohols
The process of oxidation in a chemical reaction is observed in any of the three forms:
Radical Oxidation of Allylic and Benzylic Alcohols
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
The carbonyl center is activated by...


