| 摘要 |
The invention relates to a process for the preparation of secondary phosphines of the formula (I) one another are hydrogen, halogen, (C1-C6)-alkyl or (C1-C6)-alkoxy, wherein secondary phosphine oxides of the formula (II) <IMAGE> (II) are reacted with Lewis acids as catalysts, at elevated temperature, and the secondary phosphines of the formula (I) formed are distilled off under reduced pressure.
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