The sex pheron;one of the oriental fruit moth Z-8-dodecen-1-yl acetate (1) and its E-isomer(2),as synthesized,using 1-bromohexane and propargyl alcohol as starting material through six steps in an overall yield of 29 percont.Thus,1-bromohe-2-xane was reacted with lithium salt of propargyl alcohol in liquid ammonia to give 2-nonyn-1-of (3) which was then treated with sodium 3-aminopropy lamine in 1,3-diaminopropane to give 8-nonyn-l-of (4) in 80% yield,4 was transformed into the final products by the usual method.