Many are called but few are chosen: A nonheme iron complex catalyzes the oxidation of alkyl CHbonds by using H2O2 as the oxidant, showing an enhanced selectivity for secondary over tertiary CHbonds (see scheme).
Direct functionalization of alkanes by oxidation of C–H bonds to form alcohols under mild conditions is a challenge for synthetic chemistry. Most alkanes contain a large number of C–H bonds that present difficulties for selectivity, and the oxidants employed often result in overoxidation. Here we describe a divanadium-substitutedphosphotungstate that catalyses the stereo- and regioselective hydroxylation
The selective functionalization of saturated hydrocarbons. Part 46. An investigation of Udenfriend's system under Gif conditions
作者:Derek H.R. Barton、Nathalie C. Delanghe
DOI:10.1016/s0040-4020(98)00163-x
日期:1998.4
Under Gif conditions using ascorbic acid as reductant and oxygen as oxidant in pyridine, the selectivity for secondary hydrogen functionalization is exceptional. EDTA (ethylenediamine-tetra-acetic acid) is not needed as a ligand for iron.
Oxidation with the “O2−H2O2-vanadium complex-pyrazine-2-carboxylic acid” reagent
作者:U. Schuchardt、M. C. Guerreiro、G. B. Shul'pin
DOI:10.1007/bf02498943
日期:1998.2
The oxidation of cyclohexene with hydrogen peroxide catalyzed by a vanadium complex and pyrazine-2-carboxylic acid (PCA) in air results in the formation of cyclohex-2-enyl hydroperoxide as the main product and cyclohex-2-enol, cyclohex-2-enone, cyclohex-3-enyl hydroperoxide, cyclohex-3-enol, cyclohexanol, cyclohexane, and 1,2-epoxycyclohexane in lesser amounts. The composition of the products of oxidation