The invention relates to a method of synthesis of ferroquine of formula (F) or of its metabolite of formula (Fm): comprising a reaction of reductive amination, said reaction comprising: (i) a stage of condensation of an aldehyde-amino ferrocene of formula (III), in which R represents a hydrogen atom or a methyl group, with 7-chloroquinolin-4-amine as shown below, followed by (ii) a stage of reduction of the product of condensation obtained in the preceding stage and (iii) then a stage of hydrolysis of the reaction mixture in the presence of an aqueous solution of ammonia or of citric acid.