A reliable and scalable purification procedure for the easy removal of triphenylphosphine oxide by complexation with CaBr₂ in ethereal solvents or toluene was developed. The resulting insoluble precipitated complex was easily eliminated from crude reaction mixtures in high yields by filtration without the need of purification by column chromatography. The compatibility of this procedure with different organic solvents, salts, filtration aids, packing materials, and several molecules containing most common organic functional groups was examined to explore the scope and limitations of this method. Additionally, precipitation of TPPO by complexation with other halide salts was also explored.

中文翻译：

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用 CaBr2 沉淀轻松去除反应混合物中的三苯膦氧化物

开发了一种可靠且可扩展的纯化程序，可通过在醚溶剂或甲苯中与 CaBr _{2络合轻松去除氧化三苯膦。}所得不溶性沉淀复合物通过过滤容易以高收率从粗反应混合物中除去，而无需通过柱色谱纯化。该程序与不同有机溶剂、盐、助滤剂、填料和几种含有最常见有机官能团的分子的相容性进行了检查，以探索该方法的范围和局限性。此外，还探索了通过与其他卤化物盐络合沉淀 TPPO。