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. ... [3+2] Cycloaddition methodology provides a general and efficient access to 5-alkyl substituted 2(5H)furanones. The synthetic approach has been exploited towards the synthesis of naturally occurring butenolides. ... Chiacchio, U.; Rescifina, A.; Iannazzo, D.; Romeo, G. submitted ...