Structural Revision of Thelephantin G by Total Synthesis and the Inhibitory Activity against TNF-α Production
作者:Yue Qi Ye、Hiroyuki Koshino、Jun-ichi Onose、Chiemi Negishi、Kunie Yoshikawa、Naoki Abe、Shunya Takahashi
DOI:10.1021/jo900638b
日期:2009.6.19
This paper describes the total synthesis of thelephantin G, thus revising the proposed structure 1 to 2. The key steps involved a double Suzuki−Miyaura coupling and an esterification reaction. By a similar strategy, ganbajunins D and E (3 and 4) were also prepared. Compound 2 strongly inhibited TNF (tumor necrosis factor)-α production in rat basophilic leukemia (RBL-2H3) cells: IC50 = 3.5 nM, while
本文描述了鞘磷脂G的全合成,从而将提出的结构1修改为2。关键步骤涉及Suzuki-Miyaura双偶联和酯化反应。通过类似的策略,还制备了ganbajunins D和E(3和4)。化合物2强烈抑制大鼠嗜碱性白血病(RBL-2H3)细胞中TNF(肿瘤坏死因子)-α的产生:IC 50 = 3.5 nM,而1和其区域异构体15的混合物则没有这种活性。