Three types of brassinosteroid analogues with perfluoroalkylated side chains were synthesized by using alkenecross-metathesis of a brassinosteroid derivative bearing a terminal alkene moiety with different (perfluoroalkyl)propenes. The presence of the double bonds in the cross-metathesis products allowed a facile one-step double dihydroxylation to provide intermediates that after Baeyer−Villiger oxidation