Isolation and Biological Evaluation of 8-<i>epi</i>-Malyngamide C from the Floridian Marine Cyanobacterium <i>Lyngbya majuscula</i>
作者:Jason C. Kwan、Max Teplitski、Sarath P. Gunasekera、Valerie J. Paul、Hendrik Luesch
DOI:10.1021/np900614n
日期:2010.3.26
stereoisomer of malyngamide C, 8-epi-malyngamide C (1), and the known compound lyngbic acid [(4E,7S)-7-methoxytetradec-4-enoic acid] were isolated from a sample of Lyngbya majuscula collected near Bush Key, Dry Tortugas, Florida. The structure of 1 was determined by NMR and MS experiments. The absolute configuration of 1 was determined by selective Mitsunobu inversion of C-8 to give malyngamide C, as determined
从收集到的林比亚样品中分离出一种新的马来酰胺 C 立体异构体、8- epi- malyngamide C ( 1 ) 和已知的化合物山茱萸酸 [(4 E ,7 S )-7-甲氧基十四烷-4-烯酸]靠近佛罗里达州干龟岛的布什礁。1的结构由NMR和MS实验确定。的绝对构型1是由C-8的选择性Mitsunobu转化确定,得到malyngamide C,如通过NMR,MS特定的旋转比较来确定,和。既1和malyngamide C下发现是细胞毒性HT29结肠癌细胞(IC 50 分别为 15.4 和 5.2 μM)并抑制报告基因检测中的细菌群体感应。