FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to some novel intermediate substances as such (S)-secondary alcohol of the formula (VIIIA): 
- -NH-CO-RN where X2 is chlorine or bromine atom; RN means CH3. Invention relates also to methods for preparing pharmacologically useful oxazolidinones of the formula: X-Roxa-ring-CH2-NH-CORN where ring means Roxa; 
means phenyl substituted with one fluorine atom or one amino-group. Methods involves contacting carbamate of the formula (IX): Roxa-NH-CO-O-
where X1 means C1-C20-alkyl, C3-C7-cycloalkyl, phenyl possibly substituted with C1-C3-alkyl, fluorine, chlorine, bromine or iodine atom with phthalimide reagent or with (S)-protected alcohol or protected epoxide, or (S)-3-carbon amino-alcohol under the controlled conditions in the reaction carrying out. EFFECT: improved preparing methods. 21 cl, 10 sch, 15 ex
