A simple synthesis of 1,2-bis(dimethylphosphino)ethane, 1,2-bis(diethyl-phosphino)ethane, and 1,2-bis(dicyclohexylphosphino)ethane is reported. The method involves the synthesis of 1,2-bis(dichlorophosphino)ethane using a procedure patented by Toy and Uhing; the halide is allowed to react with the appropriate Grignard reagent to give the required tetraalkyldiphosphine. The phosphines produced in this way are moderately sensitive to air but not spontaneously inflammable as previously reported.

中文翻译：

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1,2-双（二氯膦基）乙烷，1,2-双（二甲基膦基）乙烷和1,2-双（二乙基膦基）乙烷的便捷合成

报道了1，2-双（二甲基膦基）乙烷，1，2-双（二乙基膦基）乙烷和1，2-双（二环己基膦基）乙烷的简单合成。该方法包括使用Toy和Uhing专利的方法合成1，2-双（二氯膦基）乙烷。使卤化物与适当的格氏试剂反应，得到所需的四烷基二膦。如先前报道，以这种方式产生的膦对空气中等敏感，但不自然可燃。