Abstract: Three steps were used in the study to synthesize ISO E SUPER. Firstly.Acetaldehydro was reacted with butanone to obtain 3-methyl-3-pentene-2-one,which. in turn. was reacted with myrcene to form a substituted acyl cyclohexene. Finally.the so called Diels-Alder adduct was cycliced.Factors in the three steps,such as the satisfactory temperature,time of reactions.and the kind and amount of catalysts were studied.The mechanism of reactions were discussed.Yield in the three steps were 69%,81% and 93.1%, respectively.