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They can be prepared by a variety of chemical synthetic manners, and for example, phenyl-(vinylpheny)ethane may be prepared by reacting diphenylethane with acetyl chloride in the presence of a Friedel-Crafts catalyst to form phenyl(acetylphenyl)ethane, reducing the latter with sodium boron hydrine or the like, and dehydrating it. Phenyl(isopropenylphenyl)ethane can be prepared by reacting phenyl(formylphenyl)ethane with a Grignard reagent such as methylmagnesium iodide, and carrying out dehydration.

1. customThey can be prepared by a variety of chemical synthetic manners