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21.
F. Shirini G. H. Imanzadeh A. R. Mousazadeh A. R. Aliakbar 《Phosphorus, sulfur, and silicon and the related elements》2013,188(8):1640-1644
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 mixture of methanol and water in very short reaction times. 相似文献
22.
In this work,the syntheses of new thermally stable poly(amide-imide)s with pendant 2-pyridyl-1,3,4-oxadiazole units in n-butyl methyl imidazolium bromide as reaction media have been reported.A new dicarboxylic acid has been derived from the reaction of diamine,2-(5-(3,5-diaminophenyl)-1,3,4-oxadiazole-2-yl)pyridine(POBD),and trimellitic acid anhydride.Polymers were prepared from the reaction of the diimide-diacid(DIDA) and different aromatic diamines in butyl methyl imidazolium bromide,[bmim][Br],in the ... 相似文献