Marine terpenes and terpenoids. XI. Structures of new dihydrofuranocembranoids isolated from a Sarcophyton sp. soft coral of Okinawa.
作者:Masaru KOBAYASHI、Takumi HIRASE
DOI:10.1248/cpb.38.2442
日期:——
The cembranoids of a Sarcophyton sp. soft coral, collected in Okinawa, were found to be composed predominantly of dihydrofuranocembranoid derivatives (2, 3, 5a, 6 and 7) together with a hydrocarbon cembrene C (1) and a lactonic cembranoid, sarcophytonin B (4). The major constituents sarcophytonin A (2), deoxosarcophine (5a), and sarcophytonin C (6) were shown to be mixtures having similar enantiomeric ratios. The structures of the new compounds (3, 4, 6 and 7) were derived on the basis of spectroscopic studies and chemical correlations. Compounds 3 and 7 were supposed to be artefacts derived from 5a or 6 (3), and from 5a (7) respectively.
研究发现,在冲绳采集到的一种软珊瑚 Sarcophyton sp.的cembranoids 主要由二氢呋喃类cembranoid 衍生物(2、3、5a、6 和 7)、碳氢化合物 cembrene C(1)和内酯类cembranoids,即石杉碱 B(4)组成。研究表明,主要成分石杉碱甲(2)、脱氧石杉碱(5a)和石杉碱丙(6)是对映体比例相似的混合物。新化合物(3、4、6 和 7)的结构是根据光谱研究和化学关联得出的。据推测,化合物 3 和 7 分别是从 5a 或 6 (3) 以及 5a (7) 衍生出来的人工产物。