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. ... 1,2-Di(9-anthryl) ethanes, accessible by thermolysis of lepidopterenes, undergo thermal and photochemical intramolecular Diels-Alder reactions to give 1,2-dihydroanthracenes whose aromatization leads to novel derivatives of triptycene. ... A minor by-product of the thermolysis of in the ...