The main purpose of this research is focus on the synthetic studies of (Z,Z)-7,11-Hexadecadienal 2 and (Z,Z,E)-7,11,13-Hexadecatrienal 1, the major pheromone components of Phyllocnistis citrella. Using cheep and commercially available starting materials, Tetrahydrofuran 60 and Cycloheptanone 64, a efficient and reasonable synthetic procedure has been developed.