作者:M. Rotem、S. Carmely、Y. Kashman、Y. Loya
DOI:10.1016/s0040-4020(01)91843-5
日期:1983.1
Two new tetra bromo metabolites (3 and 4), possessing the hitherto unknown spirocyclohexadienyloxazoline moiety, have been isolated from the sponge Psammaplysilla purpurea. The structure of compounds 3 and 4 have been elucidated by using spectroscopic methods and chemical degradations. A mechanism for the unusual base degradation is discussed. The PND, GATED, off resonance and SFORD spectra of 3, several
从海绵Psammaplysilla purpurea中分离出了两个新的四溴代谢物(3和4),它们具有迄今未知的螺环己二烯基恶唑啉部分。化合物3和4的结构已通过使用光谱法和化学降解的方法进行了阐明。讨论了异常碱基降解的机制。3,几种降解产物和athethethein(1)的PND,GATED,非共振和SFORD光谱导致总共13 C-NMR谱线分配。建议从二溴酪氨酸开始可能的psammaplysins生物发生。