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Stereoselective expoxidation of allylic and homoallylic alcohols with 30% hydrogen peroxide catalyzed by tungstic acid in buffered media

✍ Scribed by Denis Prat; Bernard Delpech; Robert Lett

Publisher
Elsevier Science
Year
1986
Tongue
French
Weight
222 KB
Volume
27
Category
Article
ISSN
0040-4039

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✦ Synopsis

The aqueous tungstic acid-catalyzed hydrogen peroxide epoxidation of allyl i c al coho1s affo rds the same major di astereo i somer as the VO( acac) 2/tBu OOH system with quite connarab le stereoselectiviti es . In cont r ast , epoxidatIon of honeallylic al cohol s appears t o be much less stereos el ective.

πŸ“œ SIMILAR VOLUMES

Epoxidations with 30% hydrogen peroxide
Epoxidations with 30% hydrogen peroxide catalyzed by tungstic acid in buffered media
✍ Denis Prat; Robert Lett πŸ“‚ Article πŸ“… 1986 πŸ› Elsevier Science 🌐 French βš– 226 KB

The scope of the tungstic acid catalyzed hydroyen pe roxi de epoxidation of olefinic alcohols is exauined , at room temperature, i n buffered pr ot i c media. Epoxidation occurs with compl ete retention of configuration for bot h cis and tr ans al kenes . Chemoselectivity is dis cussed with respect

Highly Selective, Recyclable Epoxidation
Highly Selective, Recyclable Epoxidation of Allylic Alcohols with Hydrogen Peroxide in Water Catalyzed by Dinuclear Peroxotungstate
✍ Keigo Kamata; Kazuya Yamaguchi; Noritaka Mizuno πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons 🌐 English βš– 225 KB πŸ‘ 1 views

## Abstract The highly chemo‐, regio‐, and diastereoselective and stereospecific epoxidation of various allylic alcohols with only one equivalent of hydrogen peroxide in water can be efficiently catalyzed by the dinuclear peroxotungstate, K~2~[{W(ο£ΎO)(O~2~)~2~(H~2~O)}~2~(μ‐O)]β‹… 2 H~2~O (I). The cata