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. ... Differences in -selectivity were assessed foraldol condensations of aldehydes with the lithium salts of cyclopent-2-enone, 2-(5H)furanone, and for Lewis acid catalysed condensations with the derived trimethylsilyoxydienes. ... The aldol chemistry of cyclopent-2-enone and ...