(PhCH<sub>2</sub>PPh<sub>3</sub>)<sup>+</sup>Br<sub>3</sub> <sup>−</sup>: A Versatile Reagent for the Chemoselective Oxidation of Sulfides to Sulfoxides
作者:F. Shirini、G. H. Imanzadeh、A. R. Mousazadeh、A. R. Aliakbar
DOI:10.1080/10426500903176539
日期:2010.7.30
Benzyltriphenylphosphonium tribromide (BTPTB), as a stable solid reagent, is easily prepared by the reaction of benzyltriphenylphosphonium bromide with Br2. This reagent can be used as an efficient reagent for the chemoselective oxidation of dialkyl and aryl-alkyl sulfides to their corresponding sulfoxides in the presence of diaryl sulfides and primary alcohols. All reactions were performed in a refluxing
Efficient Method for Thioacetalization of Carbonyl Compounds in the Presence of a Catalytic Amount of Benzyltriphenylphosphonium Tribromide (BTPTB) under Solvent-Free Conditions
作者:Abdol Reza Hajipour、Seied A. Pourmousavi、Arnold E. Ruoho
DOI:10.1080/00397910802219197
日期:2008.7.24
Abstract A variety of carbonylcompounds have been successfully converted to the corresponding thioacetal derivatives in good to excellent yields on reaction of carbonylcompounds with 1,2-ethanedithiole, 1,3-propanedithiol, and ethylthiol in the presence of a catalytic amount of benzyltriphenylphosphonium tribromide (BTPTB) under solvent-free conditions. Some of the major advantages of this method