MnO2 oxidizes allylic alcohols to the corresponding aldehydes or ketones:::cis-RCH=CHCH2OH + MnO2 → cis-RCH=CHCHO + “MnO” + H2OThe configuration of the double bond is conserved in the reaction.
===Oksidant v organskih sintezah===Manganov dioksid se uporablja kot oksidant v organskih sintezah.