Intermolecularhydroacylation between salicylaldehydes 1, 26−40 and 1,4-penta- or 1,5-hexadienes 4−13 by Rh-catalyst proceeded under mild reaction conditions to give a mixture of iso- and normal-hydroacylated products 14−25, 41−55, and 57−60. In the hydroacylationreaction, chelation of both salicylaldehyde and diene to the Rh-complex plays a crucial role. The ratio of iso- and normal-hydroacylated