Investigation of the electrophilic reactivity of the cytotoxic marine alkaloid discorhabdin B
作者:Cary F. C. Lam、Tanja Grkovic、A. Norrie Pearce、Brent R. Copp
DOI:10.1039/c2ob07090a
日期:——
The mechanisms of action of the cytotoxic marine pyrroloiminoquinone alkaloids the discorhabdins are unknown. We have determined that discorhabdin B acts as an electrophile towards biomimetic thiol nucleophiles leading to debrominated adducts. In contrast, less potent cytotoxins discorhabdins D and Q failed to react, supporting an SAR model of cytotoxicity requiring an orchestrated combination of an
作者:Gerhard Lang、André Pinkert、John W. Blunt、Murray H. G. Munro
DOI:10.1021/np050333f
日期:2005.12.1
Discorhabdin W (1), isolated from a New Zealand Latrunculiasp. sponge, is a symmetrical dimer with potent in vitro activity against the P388 murine leukemia cell line. The structure and stereochemistry were assigned by using 1D- and 2D-NMR experiments and mass spectrometry. Discorhabdins B (2), D (3), G/I (4), and L (5) were also isolated from the same sponge.