24s-Stigmasta 4,25-diene,3 beta,6 beta-diol 1,a new sterol has been isolated from the algae Laurencia majuscula collected from the south China sea. Its structure was elucidated by spectroscopic methods. Compound 1 was...24s-Stigmasta 4,25-diene,3 beta,6 beta-diol 1,a new sterol has been isolated from the algae Laurencia majuscula collected from the south China sea. Its structure was elucidated by spectroscopic methods. Compound 1 was cytotoxic against the P-388 cell line with an IC50 value of 1.2 mu g/ml.展开更多
1, 3 Dipolar cycloaddition reaction between vinyl acetate and 3-hydroxypyridiniun betaine was performed under solid-liquid phase transfer catalytic condition, This reaction has been successfully used on the synthesis ...1, 3 Dipolar cycloaddition reaction between vinyl acetate and 3-hydroxypyridiniun betaine was performed under solid-liquid phase transfer catalytic condition, This reaction has been successfully used on the synthesis of an analogue of Bao-Gong-Teng A.展开更多
A new sesquiterpene, ent-furodysin (1), has been isolated from the South China Sea Sponge Dysidea fragilis, along with a known sesqui-terpene, ent-furodysinin (2). The structure and relative stereochemistry of 1 and 2...A new sesquiterpene, ent-furodysin (1), has been isolated from the South China Sea Sponge Dysidea fragilis, along with a known sesqui-terpene, ent-furodysinin (2). The structure and relative stereochemistry of 1 and 2 were established by spectral analysis.展开更多
文摘24s-Stigmasta 4,25-diene,3 beta,6 beta-diol 1,a new sterol has been isolated from the algae Laurencia majuscula collected from the south China sea. Its structure was elucidated by spectroscopic methods. Compound 1 was cytotoxic against the P-388 cell line with an IC50 value of 1.2 mu g/ml.
基金the Natural Science Foundation of Guangdong province (No. 970154).
文摘1, 3 Dipolar cycloaddition reaction between vinyl acetate and 3-hydroxypyridiniun betaine was performed under solid-liquid phase transfer catalytic condition, This reaction has been successfully used on the synthesis of an analogue of Bao-Gong-Teng A.
基金Project supported by the National Natural Science Foundation and National Education of China.
文摘A new sesquiterpene, ent-furodysin (1), has been isolated from the South China Sea Sponge Dysidea fragilis, along with a known sesqui-terpene, ent-furodysinin (2). The structure and relative stereochemistry of 1 and 2 were established by spectral analysis.
