Total Synthesis of the Antitumor Natural Product Polycarcin V and Evaluation of Its DNA Binding Profile
摘要:
The convergent total synthesis of polycarcin V, a gilvocarcin-type natural product that shows significant cytotoxicity with selectivity for nonsmall-cell lung cancer, breast cancer, and melanoma cells, has been achieved in 13 steps from 7, 8, and 22; the sequence features a stereoselective alpha-C-glycosylation reaction for the union of protected carbohydrate 7' and naphthol 8. The association constant for the binding of polycarcin V to duplex DNA is similar to that previously reported for gilvocarcin V.
Combination of solid phase and solution phase synthesis of oligosaccharides using sonication
作者:Christabel T. Tanifum、Jianjun Zhang、Cheng-Wei T. Chang
DOI:10.1016/j.tetlet.2010.06.027
日期:2010.8
An approach that combines solidphase and solution phasesynthesis of oligosaccharides via the assistance of sonication has been developed. By employing the traceless linker, the designed oligosaccharides can be obtained in pure form and, more importantly, ready for incorporation to aglycons of interest via ‘Click’ chemistry or amide linkage. The overall strategy will facilitate the studies of roles
Totalsyntheses of aturanosides A and B, two antiangiogenic anthraquinone glycosides, have been achieved in an expeditious manner, highlighting anthraquinone synthesis, phenol glycosylation, α-d-glucosaminoside installation, and judicious use of protecting groups.
turanosides A 和 B(两种抗血管生成蒽醌苷)的全合成已经以快速的方式实现,突出了蒽醌合成、苯酚糖基化、α - d-氨基葡萄糖苷安装和保护基团的明智使用。
Carbon-13 n.m.r.-spectral study of l-rhamnose acetates