Lead(IV) acetate mediated cleavage of β-hydroxy ethers: enantioselective synthesis of α-acetoxy carbonyl compounds
作者:Enrique Alvarez-Manzaneda、Rachid Chahboun、Esteban Alvarez、Ramón Alvarez-Manzaneda、Pedro E. Muñoz、Fermín Jimenez、Hanane Bouanou
DOI:10.1016/j.tet.2011.09.056
日期:2011.11
α-Acetoxy aldehydes or α-acetoxy ketones can be efficiently synthesized by treating 2,3-epoxy primary alcohols with lead tetraacetate. The reaction, which proceeds with complete regio- and stereoselectivity facilitates the enantioselective synthesis of α-acetoxy carbonyl compoundsfrom allyl alcohols, via Sharpless epoxidation. Cyclic β-hydroxy ethers, with an oxygenated five-, six- or seven-membered
Lead(IV) acetate oxidative ring-opening of 2,3-epoxy primary alcohols: a new entry to optically active α-hydroxy carbonyl compounds
作者:Enrique Alvarez-Manzaneda、Rachid Chahboun、Esteban Alvarez、Ramón Alvarez-Manzaneda、Pedro E. Muñoz、Fermín Jiménez、Hanane Bouanou
DOI:10.1016/j.tetlet.2011.05.116
日期:2011.8
The treatment of 2,3-epoxy primary alcohols with lead(IV) acetate (LTA) leads to α-acetoxy aldehydes or α-acetoxy ketones, through the nucleophilic ring-opening of an intermediate oxonium and the subsequent carbon–carbon bond cleavage. This reaction represents a new route to optically active α-hydroxy carbonyl compounds.