An efficient and simple method for enantioselectivesynthesis of (−)‐dictyopterene C' and its derivatives was developed on the basis of chiral oxazaborolidinium ion‐catalyzed enantioselective cyclopropanation and divinylcyclopropane‐cycloheptadiene rearrangement. Utilizing the Julia‐Kocienski reaction and Sonogashira and Suzuki coupling reactions, various 1,4‐cycloheptadiene compounds were synthesized