Direct, efficient, and inexpensive formation of α-hydroxyketones from olefins by hydrogen peroxide oxidation catalyzed by the 12-tungstophosphoric acid/cetylpyridinium chloride system

Abstract

The direct ketohydroxylation of a variety of 1-aryl-1-alkenes with H2O2, catalyzed by the inexpensive 12-tungstophosphoric acid/cetylpyridinium chloride system under very mild conditions, was achieved. Various acyloins were obtained in good yields and high regioselectivies.

Selective and Efficient Olefin Epoxidation by Robust Magnetic Mo Nanocatalysts

“…In this case, after only 2 h of reaction the epoxide selectivity reached 99%. In parallel, however, there seemed to occur degradation of the epoxide yielding the α-hydroxyketone derivative (Figure 6), which was formed by a ring-opening reaction of the epoxide [35].…”

Allylic azides: synthesis, reactivity, and the Winstein rearrangement

“…On a similar note, Zhang and co-workers were able to further oxidize cinnamyl azide to an α-hydroxy-ketone (Scheme 42a). 224 This double oxidation reaction is noteworthy for its chemo-and regioselectivity. The reaction selectively oxidizes the alkene over the azide (vide supra, Scheme 25).…”

Incorporation of Keggin-based H3PW7Mo5O40into bentonite: synthesis, characterization and catalytic applications

“…Polyoxometallates (POMs) or heteropoly acid (HPAs) are a large family of distinct d-block transitional metal-oxide, anionic cluster structures of metals, they have inspired several recent research activities in comprehensive elds of science. [1][2][3][4][5][6] POMs can, in some instances, be assembled with precise control regarding the placement of different heteroatoms such as W, Mo, or V within their molecular frameworks. [7][8][9] Predominantly, the Keggin-type POMs are also characteristically templated by a central tetrahedral template {XO 4 } (X ¼ P, Si, Nb, B, Ge, etc.)…”