CYCLIZATION OF POLYENES XVII . SYNTHESIS AND PHEROMONE ACTIVITY OF <scp>Dl</scp>-NEOCEMBRENE

Abstract

Abstract Neocembrene (4), a scent trail pheromone isolated recently by one of us (B. P. M.) from Australian termites, was synthesized in a dl-form starting from chloroketone (2), which was obtained from trans geranyl geranic acid chloride (1) by biogenetic type reaction. dl-Neocembrene exhibited the pheromone activity of the same order as that of the natural pheromone.