Total Synthesis, Stereochemical Assignment, and Antimalarial Activity of Gallinamide A
作者:Trent Conroy、Jin T. Guo、Roger G. Linington、Nicholas H. Hunt、Richard J. Payne
DOI:10.1002/chem.201102538
日期:2011.11.25
The total synthesis and stereochemical assignment of gallinamide A, an antimalarial depsipeptide of cyanobacterial origin, is described. Synthesis of the four possible N‐terminal diastereoisomers of gallinamide A (including the natural product symplostatin 4) was achieved using a divergent strategy from a common imide fragment. The natural product and corresponding diastereoisomers were synthesized
描述了没食子酰胺A(蓝细菌来源的抗疟疾十肽)的总合成和立体化学分配。胆碱酰胺A的四种可能的N端非对映异构体(包括天然产物symplostatin 4)的合成是通过从共同的酰亚胺片段中分离出来的策略实现的。天然产物和相应的非对映异构体以最长的线性步骤(共8步)合成,总收率为30-33%。四种合成的非对映异构体与分离的天然产物的比较NMR光谱研究表明,没食子酰胺A具有二甲基化的LN末端的异亮氨酰残基。因此,我们证明了没食子酰胺A在结构和立体化学上均与Symplostatin 4相同。还显示出没食子酰胺A及其N端非对映异构体对恶性疟原虫的3D7菌株具有显着的抗疟活性,其IC 50值在纳摩尔范围内。