Surface-mediated reactions. 5. Oxidation of sulfides, sulfoxides, and alkenes with tert-butyl hydroperoxide
作者:Gary W. Breton、John D. Fields、Paul J. Kropp
DOI:10.1016/0040-4039(95)00688-9
日期:1995.5
Silica gel mediates the reactivity of (CH3)3COOH, affording a convenient, environmentally benign method for oxidizing sulfides, sulfoxides, and alkenes. Electrophilic oxidation of sulfides and alkenes (Scheme 1A) and nucleophilic oxidation of sulfoxides (Scheme 1B) are apparently involved. Basic alumina mediates the oxidation of sulfoxides.
[EN] SELECTIVE OXIDATION OF SULFIDES BY THE USE OF AN OXIDANT SYSTEM CONSISTING OF LITHIUM MOLIBDENATE NIOBATE AND HYDROGEN PEROXIDE<br/>[FR] OXYDATION SELECTIVE DE SULFURES AU MOYEN D'UN SYSTEME OXYDANT CONSTITUE DE NIOBATE DE MOLIBDENATE DE LITHIUM ET DE PEROXYDE D'HYDROGENE
申请人:KOO SANGHO
公开号:WO2001062719A1
公开(公告)日:2001-08-30
The present invention relates to a process for selective oxidation of a sulfide by the use of lithium molibdenate niobate (LiNbMoO6) - hydrogen peroxide oxidant system to the corresponding sulfoxide or sulfone compound within a few hours under the condition of controlling the amount of hydrogen peroxide in the presence of alcohol solvent. The process for oxidizing a sulfide according to the present invention has economic advantage in view of the application for industrial use as well as in a laboratory scale because the process is carried out under mild condition, comprising of simple procedure, and the reactants are easy to handle. In particular, allylic sulfides having double bond(s) of high electron density by alkyl substitution or extended conjugation, which are apt to be attacked by electrophilic oxidants, can be subjected to selective oxidation to sulfones or sulfoxides without oxidation of the double bond(s), according to the present invention.
Selective Oxidation of Allylic Sulfides by Hydrogen Peroxide with the Trirutile-type Solid Oxide Catalyst LiNbMoO<sub>6</sub>
Chemoselective sulfur oxidation of allylic sulfides containing double bonds of high electron density due to multiple alkyl substituents or extended conjugation was developed using the composite metal oxidecatalyst, LiNbMoO(6), without any epoxidation of the electron-rich double bond(s). Selectiveoxidation to either the corresponding sulfoxides or the sulfones was realized by controlling the stoichiometry