[1-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl)propyl]-triphenylphosphonium bromide 、
4-甲酰基苯甲酸乙酯 以can be obtained p-[(E)-2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl)-1-butenyl]-benzoic acid ethyl ester of melting point 82°-83° C.的产率得到p-[(E)-2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl)-1-butenyl]-benzoic acid ethyl ester