反应详情

0.448 g (2 millimols) of palladium acetate, 28.11 g (0.2 mol) of benzoyl chloride, 23.64 g (0.2 mol) of α-methylstyrene and 27.04 g (0.2 mol) of N-benzyldimethylamine in 400 ml of p-xylene are stirred for 11 hours at 130° C. The mixture is extracted by shaking with 400 ml of 2 NHCl and 400 ml of 2 N NaOH and is then dried over magnesium sulfate. The crude product is chromatographed on silica gel in methylene chloride and subsequently recrystallised from n-pentane. 1.3 g (3% of theory) of α-methylstilbene are obtained as colourless crystals of melting point 79.0° C.

1. extractionThe mixture is extracted
2. dry with materialis then dried over magnesium sulfate
3. customThe crude product is chromatographed on silica gel in methylene chloride
4. customsubsequently recrystallised from n-pentane