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首页> 外文期刊>Journal of Applied Polymer Science >A comparison of the oxidizing ability of polystyrene-supported linear and cyclic polyoxyethylene bound permanganates
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A comparison of the oxidizing ability of polystyrene-supported linear and cyclic polyoxyethylene bound permanganates

机译：聚苯乙烯负载的线性和环状聚氧乙烯结合高锰酸盐的氧化能力比较

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摘要

The grafting of linear and cyclic polyoxyethylenes into DVB-crosslinked chloromethylpolystyrene was carried out by treating with polyethyleneglycol (PEG(600)). The complexations of crosslinked polystyrene-supported linear and cyclic polyoxyethylene with permanganate functions were carried out. With this reagent, primary alcohols and secondry alcohols were converted to aldehydes and ketones and aldehyde to acid. The polymer acts as a reservoir of permanganate functions and releases them slowly as the substrates are being used up. The effect of solvent, molar excess of reagent, time, and temperature on oxidation behavior were investigated by choosing benzoin to benzil conversion as the model reaction. The linear polymeric reagent has greater reactivity than the cyclic polymer due to the greater availability of the reactive sites in the linear polymer than the cyclic polymer. Polymeric reagent could be used in excess to get a good yield without causing any separation problems and over oxidation products. The reagents have advantages of easy separation, regeneration and reuse. (c) 2005 Wiley Periodicals, Inc.
机译：通过用聚乙二醇（PEG（600））处理，将线性和环状聚氧乙烯接枝到DVB-交联的氯甲基聚苯乙烯中。进行了具有高锰酸盐官能团的交联聚苯乙烯负载的线性和环状聚氧乙烯的络合。用这种试剂，伯醇和仲醇被转化为醛和酮，醛被转化为酸。聚合物充当高锰酸盐功能的储存库，并在基材用完时缓慢释放它们。以苯偶姻到苯甲酰的转化为模型反应，研究了溶剂，试剂摩尔过量，时间和温度对氧化行为的影响。线性聚合物试剂具有比环状聚合物更大的反应性，这是因为线性聚合物中的反应性位点比环状聚合物更大。可以过量使用聚合试剂以获得良好的收率，而不会引起任何分离问题和过度氧化的产物。试剂具有易于分离，再生和再利用的优点。 （c）2005年Wiley Periodicals，Inc.

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