[C:1]1([CH2:7][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:14](Cl)([CH3:17])([CH3:16])[CH3:15]>Cl.[Al+3].[Cl-].[Cl-].[Cl-]>[CH3:15][C:14]([C:4]1[CH:5]=[CH:6][C:1]([CH2:7][C:8]2[CH:9]=[CH:10][C:11]([C:1]([CH3:7])([CH3:6])[CH3:2])=[CH:12][CH:13]=2)=[CH:2][CH:3]=1)([CH3:17])[CH3:16]In a 500-ml flask, to a mixture of 16.8 g (100 mmol) of diphenylmethane and 21.3 g (230 mmol) of tert-butyl chloride, 67 mg (0.5 mmol) of anhydrous AlCl3 were added, at room temperature, under vigorous stirring, resulting in immediate HCl gas emission. The reaction mixture turned red. After 5 min, a second portion of 67 mg (0.5 mmol) of AlCl3 were added. After 5 min of vigorous stirring, the reaction mixture became hard. After about 1 h, the hard mass obtained was recrystallised from about 100 mL of hot isopropanol. The crystalline product precipitated from this solution at a temperature of −30° C. after a period of time of about 2 to 3 h. It was separated, washed with 50 ml of cold isopropanol, and dried in vacuum under a reduced pressure of 10 to 20 mm Hg. 19.6 g of product were obtained with a yield of 70%. The procedure was repeated with a yield ranging between 67 and 74%.
Wird geladen…
