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. ... Synthesis of (±) silphinene from readily available 2,4,4-trimethylcyclopentanone is reported. The stereospecific radical cyclization of8 giving9 exclusively is the cornerstone of the synthesis. ... Synthesis of (±)-silphinene 2,4,4-trimethylcyclopentanone employing ...