Acetophenone and benzoic acid do not react under the framework of high school knowledge. People think that F-C reaction may occur in university organic science. Acetophenone and benzoic acid undergo F-C acylation reaction in the presence of strong Lewis acids such as aluminum trichloride (usually carboxylic acid is rarely used as acylating agent, so the reaction is less), and m-benzoyl acetophenone (in fact, it should be called p-acetophenone) is generated.

Ph-Coch3+pH-Cooh-AlCl3 Catalysis-(P -(P-) CH3Co-pH-Co-pH-Co-pH. 。

However, I suspect that the landlord copied the wrong question. If the product on the horizontal line is changed to benzaldehyde ph-CHO, it is a typical hydroxyl "ketone" condensation (a variant of aldol condensation), and the product is γ-hydroxyl-γ-phenyl-propionyl benzene, which is finally dehydrated to form 1, 3- diphenyl-propane -2- ene -65438.

pH-coch 3+pH-CHO-acid > pH-CO-CH2-CH(OH)-pH->ph-CO-CH2=CH-ph