2-Telraloncs mono- and disubstitutcd with methoxy or hydroxy groups in the aromatic ring are hydrogenated to 2-tetralols in good yields by non-fermenting baker's yeast. The prevalent enantioform of the reduction product and its e.e. were found to depend on the substitution pattern. In one case, i.e. the biotransformation of 5-mcthoxy-2-tetralone into the corresponding 2-tetralol, an e.e. ≥ 98% was