Two new saponins named davuricoside I (1) and davuricoside E (2) were isolated fromthe whole plants of Lysimachia davurica. Their structures were determined by 1D and 2D NMR,FAB-MS techniques, and chemical methods.
Starting from shikimic acid, the total synthesis of zeylenone was studied. The productwas proved to be the (+)antipode of zeylenone through analysis and comparison of their respectivespectra (including NMR, MS, IR and...Starting from shikimic acid, the total synthesis of zeylenone was studied. The productwas proved to be the (+)antipode of zeylenone through analysis and comparison of their respectivespectra (including NMR, MS, IR and CD) and optical data. The absolute configuration of thenatural product was thus determined to be (1S,2S,3R).展开更多
基金This research was supported by the National Natural Science Foundation of China(Grant No.39870085).
文摘Two new saponins named davuricoside I (1) and davuricoside E (2) were isolated fromthe whole plants of Lysimachia davurica. Their structures were determined by 1D and 2D NMR,FAB-MS techniques, and chemical methods.
文摘Starting from shikimic acid, the total synthesis of zeylenone was studied. The productwas proved to be the (+)antipode of zeylenone through analysis and comparison of their respectivespectra (including NMR, MS, IR and CD) and optical data. The absolute configuration of thenatural product was thus determined to be (1S,2S,3R).
