Ethanol → Phosphonium, diethyldiphenyl-, iodide
Reaktionsgleichung
[C:1]1([PH:7][C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C(=O)([O-])[O-].[K+].[K+].[CH2:20]([I:22])[CH3:21].[CH2:23](O)[CH3:24]>>[I-:22].[C:8]1([P+:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)([CH2:20][CH3:21])[CH2:23][CH3:24])[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1Komponenten
5
Versuchsvorschrift
50 g of diphenylphosphine were mixed with 150 ml of ethanol under nitrogen atmosphere. 37.12 g of potassium carbonate were then added to the mixture and the mixture was stirred. Finally, 125.73 g of ethyl iodide were added dropwise. After 48 hours at 50° C., the ethanol was removed. The product was then dissolved in chloroform. The chloroform was evaporated and the solid washed with diethyl ether and dried under vacuum. 98.45 g of diphenyl-diethyl-phosphonium iodide were obtained (98.5% wt. yield)