A new triterpenoid saponin, 21 β-angeloylprotoaescigenin-3β-O- [α-L-rhamnopyranosyl- （1-3）]β-D-glucopyranosiduronic acid 1, was isolated from the seeds of Aesculus assamica Griff. Its structure was elucidated on...A new triterpenoid saponin, 21 β-angeloylprotoaescigenin-3β-O- [α-L-rhamnopyranosyl- （1-3）]β-D-glucopyranosiduronic acid 1, was isolated from the seeds of Aesculus assamica Griff. Its structure was elucidated on the basis of spectroscopic data analysis.展开更多
Methyl-（γ-chloropropyl）dichlorosilane was synthesized under the catalysis of a silicasupported Karstedt-type catalyst. By orthogonal experimental design method, the optimum reaction parameters such as reactants rat...Methyl-（γ-chloropropyl）dichlorosilane was synthesized under the catalysis of a silicasupported Karstedt-type catalyst. By orthogonal experimental design method, the optimum reaction parameters such as reactants ratio, reaction temperature and time, and the dosage of catalyst, were determined. At the optimum reaction condition the product yield reached 78.42%, which is higher than that reported in the literatures.展开更多
文摘A new triterpenoid saponin, 21 β-angeloylprotoaescigenin-3β-O- [α-L-rhamnopyranosyl- （1-3）]β-D-glucopyranosiduronic acid 1, was isolated from the seeds of Aesculus assamica Griff. Its structure was elucidated on the basis of spectroscopic data analysis.
基金support from the National Natural Science Foundation of China(No.50473036)
文摘Methyl-（γ-chloropropyl）dichlorosilane was synthesized under the catalysis of a silicasupported Karstedt-type catalyst. By orthogonal experimental design method, the optimum reaction parameters such as reactants ratio, reaction temperature and time, and the dosage of catalyst, were determined. At the optimum reaction condition the product yield reached 78.42%, which is higher than that reported in the literatures.
