Phosphonium salts and aldehydes from the convenient, anhydrous reaction of aryl acetals and triphenylphosphine hydrobromide
作者:Mani Ramanathan、Duen-Ren Hou
DOI:10.3998/ark.5550190.0014.308
日期:——
The reactions of aryl acetals/ketals and triphenylphosphine hydrobromide gave the corresponding aldehydes/ketones and alkyl phosphonium bromides. This reaction was applied to convert acetals/ketals to the corresponding aldehydes/ketones under an anhydrous and convenient condition (50 oC, 5 min, up to 90% yield), and acid sensitive functional groups were compatible.
Reactions of phosphines with acetylenes. Part XII. The mechanisms of 1,2-aryl migrations common to αβ-unsaturated phosphonium salts and “Wittig-type” phosphonium betaines
作者:Eileen M. Richards、John C. Tebby
DOI:10.1039/j39710001059
日期:——
The reactions of (a) methylenetriphenylphosphorane with benzaldehyde in alcohol, (b) triarylphosphines with styrene oxide in alcohol, and (c) triarylphosphines with electrophilic acetylenes and water, and (d) the alkaline hydrolysis of αβ-unsaturatedphosphoniumsalts, all involve the formation of an equilibrium mixture of a betaine, a hydroxyethylphosphonium salt, an αβ-unsaturatedphosphonium hydroxide