not. Prepared terpinen-4-ol hydroperoxide (T4-H) also efficiently cleaved the C-C bond of the α-dicarbonylcompounds via Baeyer-Villiger-like rearrangement and subsequent hydrolysis of an acid anhydride moiety in the rearranged product to give carboxylic acids. Other terpene hydroperoxides, as well as T4-H, showed significant cleaving activities, and all these hydroperoxides protected RNase A from the
Trypanocidal constituents of dried leaves of Laurus nobilis L. (Lauraceae) were examined. Activity-guided fractionation of the methanol extract resulted in the isolation of two guaianolides, dehydrocostus lactone (1) and zaluzanin D (2), and a new p-menthane hydroperoxide, (1R,4S)-1-hydroperoxy-p-menth-2-en-8-ol acetate (3). The minimum lethal concentrations of these compounds against epimastigotes of Trypanosoma cruzi were 6.3, 2.5, and 1.4 μM, respectively.
研究了月桂科植物月桂(Laurus nobilis L.)干燥叶片中的杀锥虫成分。通过对甲醇提取物进行活性引导分馏,分离出了两种愈创木内酯:脱氢木内酯(1)和扎鲁赞宁 D(2),以及一种新的对薄荷氢过氧化物:(1R,4S)-1-hydroperoxy-p-menth-2-en-8-ol acetate(3)。这些化合物对克氏锥虫表皮原体的最小致死浓度分别为 6.3、2.5 和 1.4 μM。