(-)-3-Isothujone and (+)-3-thujone were examined for antinociceptive activity using the hot-plate and Nilsen tests. In the hot plate test (-)-3-isothujone (ED50 = 6.5 mg/kg) was found to be codeine-like and equipotent with (-)-delta9-tetrahydrocannabinol while the racemic material was essentially half as potent as the levoratatory isomer. (+)-3-Thujone was inactive in both antinociceptive tests as were several structural analogues of the 3-thujones. As with the THC's less antinociceptive activity was observed in the Nilsen test than in the hot-plate assay. Acute toxicities for the 3-thujones were determined and vastly improved synthetic procedures have been developed for two long-known but difficulty accessible 3-thujanols.
(-)-3-异
硫酮和(+)-3-
硫酮通过热板实验和尼尔森试验进行了抗痛觉活动测试。在热板实验中,(-)-3-异
硫酮(ED50=6.5 mg/kg)被发现类似于
可待因,并与(-)-Δ9-
四氢大麻酚等效能,而外消旋体的效力大约是左旋异构体的一半。在尼尔森测试中,与四氢
大麻酚类似地,观察到较低的抗痛觉活动。此外, (+)-3-
硫酮在两种抗痛觉测试中均未表现出活性,而3-
硫酮的几个结构类似物也未能显示活性。进一步确定了3-
硫酮的急性毒性,并为两种已知但难以获取的3-
硫醇开发了大大改进的合成方法。