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- W2040744376 abstract "Die aus den o-Lithium-fluor-Aromaten 6, 9, 10, 11 und Triarylphosphinen bei tiefer Temperatur entstehenden Betaine des Typs 2 lassen sich durch Protonierung mit Fluoren oder durch Alkylierung mit Methyljodid stabilisieren. Dabei entstehen unter äußerst milden Bedingungen und in guter Ausbeute Tetraarylphosphoniumsalze. Aus den Lithium-fluor-toluolen 7 und 8 erhält man jeweils identische Isomeren-Gemische, was das Auftreten einer dehydroaromatischen Zwischenstufe beweist. Quaternization of Triarylphosphines with Dehydroaromatics1) The betaines 2, formed at low temperatures from the o-lithiofluoroaromatics 6, 9, 10, 11 and triarylphosphines may be stabilized by protonation with fluorene or by alkylation with methyl iodide. Tetraarylphosphonium salts are thereby formed in good yield under extremely mild conditions. Identical isomeric mixtures are obtained in each case from the lithiofluorotoluenes 7 and 8, thus confirming the formation of a dehydroaromatic intermediate." @default.
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- W2040744376 title "Quaternierung von Triarylphosphinen mit Dehydroaromaten1)" @default.
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