Study for reaction of sesquiterpene hydrocarbons

研究了具有独特环状结构的倍半萜烃的自氧化反应和直接双硫化反应。并对反应产物对白蚁和腐木真菌的生物活性进行了测试。石竹烯和葎草烯可通过自氧化或直接硫化反应生成环氧化物或异硫化物。长叶烯和叔叶烯很容易通过自氧化生成独特的产物、北萜类或过氧化物等。然而，长叶烯或四烯与单质硫的反应没有产生独特的产物。在生物活性试验中，原倍半萜化合物对白蚁和木腐真菌无生物活性。其自氧化产物和直接扩硫产物具有杀菌、抗食性和抗真菌活性。

Reactions of autoxidation and direct-episulfidation were examined for sesquiterpene hydrocarbons which have unique ring structure. And bioactivities of products of the reaction were also tested for termite and wood decay fungi. Caryophyllene and humulene were easily changed to epoxides or episulfides by autoxidation or direct-epusulfidation. Longifolene and thujopsene were easily changed to unique products, norterpenoids or peroxides etc., by autoxidation. However, unique products were not produced in the reactions of longifolene or thujopsene with elemental sulfur. In the bioactivity tests, original sesquiterpene hydrocarbons had no bioactivities against the termite and the wood decay fungi. The autoxidation and direct-epusulfidation products had termicidal, anti-feedant and anti-fungal activities.