Abstract The synthesis of 7-hydroxy, 8-hydroxy and 7, 8-dihydroxy prochlorperazines (3a) and per-phenazines (3b) is reported. The parent ehlorophenothiazines were prepared analogously to previously reported chlorpromazine (3e) metabolite syntheses. The prochlorperazine side chain was introduced in one step using 1-(3-chloropropyl)-4- methylpiperazine and the perphenazine side chain in two steps, first reaction with 1- ...