Study for reaction of sesquiterpene hydrocarbons

研究了具有独特环结构的倍半萜烃类化合物的自氧化反应和直接硫化反应。反应产物对白蚁和木腐菌的生物活性也进行了检测。石竹烯和虎杖烯易通过自氧化或直接硫化反应生成环氧化物或表硫化物。长叶烯和刺参在自氧化作用下容易转化为独特的产物，如去甲基萜类或过氧物等。然而，在长叶烯或粗枝烯与元素硫的反应中，没有产生独特的产物。在生物活性测试中，原始倍半萜类化合物对白蚁和木材腐烂真菌没有生物活性。自氧化和直接硫化产物具有杀灭白蚁、拒食和抗真菌活性。

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.