Isolation and structure determination of aplidinones A-C from the Mediterranean ascidian Aplidium conicum:: A successful regiochemistry assignment by quantum mechanical 13C NMR chemical shift calculations

被引:41
作者
Aiello, A [1 ]
Fattorusso, E [1 ]
Luciano, P [1 ]
Mangoni, A [1 ]
Menna, M [1 ]
机构
[1] Univ Naples Federico II, Dipartimento Chim Sostanze Nat, I-80131 Naples, Italy
关键词
tunicates; ascidians; natural products; quinones; NMR spectroscopy; density functional calculations; GIAO;
D O I
10.1002/ejoc.200500473
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A chemical investigation of a Mediterranean ascidian, Aplidium conicum, has resulted in the isolation of the new metabolites aplidinone A (1), B (2), and C (3). The structures of aplidinones A-C were determined by interpretation of spectroscopic data, whereas the regiochemistry was determined by the comparison of experimental C-13 NMR chemical shifts with those predicted by GIAO shielding calculations. (c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005.
引用
收藏
页码:5024 / 5030
页数:7
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