Lyngbyabellins K-N from Two Palmyra Atoll Collections of the Marine Cyanobacterium Moorea bouillonii
作者:Hyukjae Choi、Emily Mevers、Tara Byrum、Frederick A. Valeriote、William H. Gerwick
DOI:10.1002/ejoc.201200691
日期:2012.9
and 5) and one linear (4), were isolated from the extracts of two collections of filamentous marine cyanobacteria obtained from Palmyra Atoll in the Central Pacific Ocean. Their planar structures and absolute configurations were elucidated by combined spectroscopic and chromatographic analyses as well as chemical synthesis of fragments. In addition to structural features typical of the lyngbyabellins
从中央太平洋帕尔米拉环礁的两个丝状海洋蓝细菌的提取物中分离出五个lyngbyabellin结构类别的脂肽,四个环状(1-3和5)和一个线性(4)。通过结合光谱和色谱分析以及碎片的化学合成,阐明了它们的平面结构和绝对构型。除了lyngbyabellins典型的结构特征(例如两个噻唑环和氯化的2-甲基辛酸酯残基)外,这些新化合物还具有几个独特的方面。值得注意的是,代谢物2和3在3-酰氧基-2-甲基辛酸残基上具有罕见的单氯化作用,而lyngbyabellin N(5)具有不寻常的N,N-二甲基缬氨酸末端。Lyngbyabellin N也拥有亮氨酸他汀类药物残基,