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. ... Synthetic studies related to pentalenolactones; Improved preparation of the Tsuji's conjunctive reagent. ... The conjunctive reagent was efficiently prepared from methallyl phenyl sulfone. Palladium catalyzed cycloaddition with 5,5-dimethylcyclopent-2-enone then gave potent ...