A facile and efficient diastereoselective synthesis of methyl 3β-hydroxyeudesmane-4,11(13)-dien-12-oicate starting from (+)-dihydrocarvone has been carried out in 9 steps at the first time.
为研究长叶香茶菜Rabdosia stracheyi(Benth ex Hook.)Hara的化学成分,本文采用硅胶、反相硅胶C 18、葡聚糖凝胶Sephadex LH-20、反相半制备高效液相等色谱方法对长叶香茶菜地上部分进行分离、纯化,利用1 H NMR、13 C NMR、HR-ESI-MS等...为研究长叶香茶菜Rabdosia stracheyi(Benth ex Hook.)Hara的化学成分,本文采用硅胶、反相硅胶C 18、葡聚糖凝胶Sephadex LH-20、反相半制备高效液相等色谱方法对长叶香茶菜地上部分进行分离、纯化,利用1 H NMR、13 C NMR、HR-ESI-MS等波谱数据,结合参考文献,鉴定化合物的结构。结果表明,从长叶香茶菜地上部分分离得到12个三萜类化合物,它们分别是木栓醇(1)、齐墩果酸(2)、3β-羟基-齐墩果烷-11,13(18)-二烯-28酸(3)、2α,3α-二羟基齐墩果-12-烯-28酸(4)、2 a,3a,24-三羟基-12-烯-28-齐墩果酸(5)、2α,3β,24-三羟基齐墩果-12-烯-28酸(6)、cleistocalyxin(7)、熊果醇(8)、2α-羟基乌苏酸(9)、2a,3a,24-三羟基熊果-12,20(30)-二烯-28-酸甲酯(10)、maquatic acid(11)和2α,3α,24-三羟基-12,20(30)-二烯乌苏酸(12)。以上得到的三萜类化合物均为首次从该植物中分离得到。展开更多
AIM: To isolate the chemical constituents from the fruits of Hovenia acerba. METHODS: Compounds were isolated with stratography and solvent,and their structures were identified by spectroscopy. RESULTS: Five compounds...AIM: To isolate the chemical constituents from the fruits of Hovenia acerba. METHODS: Compounds were isolated with stratography and solvent,and their structures were identified by spectroscopy. RESULTS: Five compounds were identified as β-sitoseterol, betulin,3β-hydroxy olean-18(19)-en-28-oic acid, 2α,3β-dihydroxy-lup-20(29)-en-28-oic acid and daucosterol. CONCLUSION: The five compounds were obtained from Hovenia Thunb. for the frist time.展开更多
文摘A facile and efficient diastereoselective synthesis of methyl 3β-hydroxyeudesmane-4,11(13)-dien-12-oicate starting from (+)-dihydrocarvone has been carried out in 9 steps at the first time.
文摘为研究长叶香茶菜Rabdosia stracheyi(Benth ex Hook.)Hara的化学成分,本文采用硅胶、反相硅胶C 18、葡聚糖凝胶Sephadex LH-20、反相半制备高效液相等色谱方法对长叶香茶菜地上部分进行分离、纯化,利用1 H NMR、13 C NMR、HR-ESI-MS等波谱数据,结合参考文献,鉴定化合物的结构。结果表明,从长叶香茶菜地上部分分离得到12个三萜类化合物,它们分别是木栓醇(1)、齐墩果酸(2)、3β-羟基-齐墩果烷-11,13(18)-二烯-28酸(3)、2α,3α-二羟基齐墩果-12-烯-28酸(4)、2 a,3a,24-三羟基-12-烯-28-齐墩果酸(5)、2α,3β,24-三羟基齐墩果-12-烯-28酸(6)、cleistocalyxin(7)、熊果醇(8)、2α-羟基乌苏酸(9)、2a,3a,24-三羟基熊果-12,20(30)-二烯-28-酸甲酯(10)、maquatic acid(11)和2α,3α,24-三羟基-12,20(30)-二烯乌苏酸(12)。以上得到的三萜类化合物均为首次从该植物中分离得到。
文摘AIM: To isolate the chemical constituents from the fruits of Hovenia acerba. METHODS: Compounds were isolated with stratography and solvent,and their structures were identified by spectroscopy. RESULTS: Five compounds were identified as β-sitoseterol, betulin,3β-hydroxy olean-18(19)-en-28-oic acid, 2α,3β-dihydroxy-lup-20(29)-en-28-oic acid and daucosterol. CONCLUSION: The five compounds were obtained from Hovenia Thunb. for the frist time.