The method of benzoic acid to benzoic acid
If benzoic acid is to be converted into phenylacetic acid, there are various methods. The benzoic acid and lithium aluminum hydride can be first encountered in a suitable environment. This lithium aluminum hydride is active and can return the carboxyl group of benzoic acid to an alcohol group to obtain benzyl alcohol.

Then take the formed benzyl alcohol and use a halogenating agent such as hydrohalic acid or halogenated phosphorus to make the alcohol hydroxyl group easily become a halogen atom to obtain halogenated benzyl.

Then the halogenated benzyl is co-placed with cyanizing reagents such as sodium cyanide. According to the principle of nucleophilic substitution, the halogen atom is replaced by a cyanide group to obtain benzyl acetonit

The end is catalyzed by acid or base to hydrolyze phenylacetonitrile, and the carboxyl group is formed, and the final phenylacetic acid is obtained. This method follows the principle of chemistry and proceeds step by step, which can lead to the transition from benzoic acid to phenylacetic acid.