Nuapapuin A and Sigmosceptrellins D and E: New Norterpene Cyclic Peroxides from a Southern Australian Marine Sponge, <i>Sigmosceptrella </i>sp.
作者:Simon P. B. Ovenden、Robert J. Capon
DOI:10.1021/np980223r
日期:1999.2.1
A Sigmosceptrella sp. from the Great Australian Bight, Australia, has yielded the new norditerpene cyclic peroxide, nuapapuin A (2a), and the norsesterterpene cyclic peroxide sigmosceptrellin D (3a), characterized as the corresponding methyl esters 2b and 3b. The crude methylated sponge extract also yielded the new norsesterterpene cyclic peroxide sigmosceptrellin E methyl ester (4). Relative stereochemistry
Sigmosceptrella sp.。来自澳大利亚大澳大利亚湾(Great Australian Bight)的产品已生产出新的降冰片萜烯环过氧化物,nuapapuin A(2a)和降冰片萜烯环过氧化物sigmosceptrellin D(3a),其特征为相应的甲酯2b和3b。粗甲基化的海绵提取物还产生了新的去甲脂萜烯环过氧化物西格西夫林E甲酯(4)。有关C2,C3和C6的相对立体化学是通过已建立的经验规则指定的,而绝对立体化学是通过高级Mosher程序指定的。已经提出了一条合理的生物合成途径,该途径合理化了所有已知的萜烯环过氧化物和相关的萜烯酮,二烯和Sigmosceptrin的生物合成中的关键转化。