Diphosphines of the class RPhP(CH2)"PPhR ( = 2-6) have been prepared from the reactions of the corresponding Ph2P(CH2)"PPh2 with alkali metal followed by alkylation. Ultrasound irradiation should be applied in the reductive cleavage stage so as to assure the purity of the final products.Diphosphines of the general type PhRP(CH2)"PRPh are mechanistic study of various transition-metal complexes important chelating reagents for the preparation and
Bei der Behandlung mit Lithium unter Ultraschall‐Bestrahlung erhält man aus den Bis‐(diphenylphosphin)‐alkanen (I) die Dianionen (II), die nach Abfangen der mitentstandenen Phenylanionen (III) durch deren Umsetzung mit tert.‐Butylchlorid weiter mit Methyliodid zu (IV) bzw. mit Cyclohexylbromid zu (V) reagieren.
The bis(diphenylphosphino)alkanes (I) react with sodium/naphthalene under reductive cleavage of the aryl‐phosphorus bond to yield the compound (II) which can be methylated to (III).
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