The invention comprises compounds of general formula <;FORM:1003491/C2/1>; where X is a chlorinated or a brominated lower (i.e. 1-4 C) alkyl group; and their preparation by reaction of an appropriate phenol or its alkali metal salt with a compound Cl-CO.O-X. Chloroformates Cl-CO.O-X are prepared from haloalkanols with phosgene. Pharmaceutical compositions comprise compounds I with carriers. Solid and liquid (syrups, elixirs and suspensions) preparations are mentioned for oral administration, the compounds having analgesic and hypnotic properties.;FORM:1003491/C2/1>