Three menthols, (+)- and(-)-neomenthols and(+)-isomenthol were biotransformed by Aspergillus niger which converted nonspecifically (-)- and (+)-neomenthols to mere hydroxylated compounds, whereas, (+)-isomenthol was smoothly converted into 1-hydroxyisomenthol and 6-hydroxyisomenthol by the same fungus.
457. Stereochemistry of cyclohexane derivatives. Part III. Hydroxylation of (+)-trans-p-menth-2-ene