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. ... Selenofluorenone, prepared from fluorenyl selenocyanate by base-induced elimination, participates efficiently in Diels-Alder cycloaddition and 1,3-dipolar cycloaddition reactions. ... The cycloaddition reactivity of selenofluorenone, 1, is described. Treatment of fluorenyl selenocyanate with ...