新型α-龙脑烯醛基噻二唑-膦酸酯化合物的合成及其抑菌活性

摘要

α-Campholenic aldehyde (3) was prepared by the epoxidation and catalytic isomerization ofα-pinene.Then,α-campholenic aldehyde-based thiadiazole(5) was prepared by the cyclization reac-tion of α-campholenic aldehyde-based thiosemicarbazone , which was obtained by the reaction of thio-semicarbazide with 3.Eleven novel α-campholenic aldehyde-based thiadiazole-phosphonate compounds (6a~6k) were synthesized by the Mannich-type reaction from 5.The structures were characterized by 1 H NMR, 13 C NMR, IR and ESI-MS.Antifungal activities test showed that 6b had inhibition rate of 60.5%against Physalospora piricola at 50 μg· mL-1 .%以α-蒎烯为原料,经环氧化和催化异构反应得α-龙脑烯醛(3);3与氨基硫脲反应制得α-龙脑烯醛基缩氨基硫脲,再环合生成α-龙脑烯醛基噻二唑,最后将其与亚磷酸三苯酯和一系列醛通过类Mannich反应合成了11个新型α-龙脑烯醛基噻二唑-膦酸酯化合物(6a~6k),其结构经1 H NMR,13 C NMR,IR和ESI-MS表征.抑菌活性测试结果表明:在用药量为50μg·mL-1时,6b对苹果轮纹病菌的抑制率为60.5%.