beta-(p-Chlorophenyl)propionic acid

It provides the p-chlorophenylpropionic acid moiety, which forms the arylpropyl side chain essential for the molecule’s pharmacophore. This acid typically undergoes activation (e.g., conversion to an acid chloride or via coupling agents) followed by amide or ether bond formation with appropriate intermediates. Through subsequent cyclization and functional group modifications, it contributes to constructing the piperidine-containing heterocyclic framework of Pitolisant, which is critical for its activity as a histamine H₃ receptor antagonist. β-(p-Chlorophenyl)propionic acid is a key starting material in the synthesis of Pitolisant hydrochloride.