Enantioselective Preparation of 1,3-Cyclohexadiene and 1,4-Cycloheptadiene Derivatives: Synthesis of (+)-Dictyopterene C′

Starting from optically active 5-trimethylsilyl-2-cyclohexen-1-one derivatives, the title dienes were synthesized by using silicon-mediated 1,4-elimination as a key step. A straightforward synthesis of the unnatural enantiomer of (−)-dictyopterene C′ utilizing the method was also carried out.