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. ... The 4-substituted 1,2,4-triazoline-3,5-diones( ) afford with sulfides( ) having acidic α-hydrogens the 1,4-disubstituted urazoles( ). Reactivity of the triazolinedione shows similarity in possible reaction modes with that of singlet oxygen. ... TAD was consumed very fast in the reaction ...