Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... 5-Hydroxylalkenes react with rhenium(VII) oxide in the presence of another oxidant, H 5 IO 6 , to provide substituted tetrahydrofurans. The yield and stereoselectivity are comparable to stoichiometric results. ... 5-Hydroxyalkenes are oxidized by Re 2 O 7 in the presence of H 5 IO 6 to ...