Three novel interesting polychlorinated cyclodipeptides,designated dyssmide A(1),B(2),C(3)and a known compound,2,3-dihydrodyeamide C(4)were isolated from the sponge Dysidea sp.Their structures were elucidated by spect...Three novel interesting polychlorinated cyclodipeptides,designated dyssmide A(1),B(2),C(3)and a known compound,2,3-dihydrodyeamide C(4)were isolated from the sponge Dysidea sp.Their structures were elucidated by spectroscopic methods.展开更多
Cholest-5-en-24-oxo-3, 19-diacetate was synthesized starting from stigmasterol 3 via seven step reactions in 21.0% overall yield. It can be served as a key intermediate for the synthesis of many biologically active 1...Cholest-5-en-24-oxo-3, 19-diacetate was synthesized starting from stigmasterol 3 via seven step reactions in 21.0% overall yield. It can be served as a key intermediate for the synthesis of many biologically active 19-hydroxylated sterols.展开更多
A new ceramide, biemnamide, was isolated from the marine sponge Biemne sp. collected from the South China Sea and Its structure was established by spectroscopic analysis.
基金Supported by the National Natural Science Foundation the State Education Committee Of China
文摘Three novel interesting polychlorinated cyclodipeptides,designated dyssmide A(1),B(2),C(3)and a known compound,2,3-dihydrodyeamide C(4)were isolated from the sponge Dysidea sp.Their structures were elucidated by spectroscopic methods.
基金We are grateful to the National Natural Science Foundation of China (No. 29932030) and Natural Science Foundation (No. 970154) of Guangdong Province for financial support for this work.
文摘Cholest-5-en-24-oxo-3, 19-diacetate was synthesized starting from stigmasterol 3 via seven step reactions in 21.0% overall yield. It can be served as a key intermediate for the synthesis of many biologically active 19-hydroxylated sterols.
文摘A new ceramide, biemnamide, was isolated from the marine sponge Biemne sp. collected from the South China Sea and Its structure was established by spectroscopic analysis.
