Bioassay-guided isolation of the EtOAc extract of a marine Bacillus sp., cultured in modified Bennett's broth medium, yielded four new antimicrobial fatty acids, named ieodomycins A-D (1-4). The planar structures of these new compounds were determined by extensive 1D and 2D NMR and HRESIMS spectroscopic data analysis. Their absolute configurations were elucidated by modified Mosher's method and literature data review. All four new compounds (1-4) demonstrated antimicrobial activities in vitro.
Synthesis of Ieodomycin D
作者:Anders Vik、Jørn Tungen、Marius Aursnes
DOI:10.1055/s-0035-1562776
日期:——
A synthesis of the marine natural product ieodomycin D has been achieved in seven steps and 16% overall yield from commercially available pyridinium-1-sulfonate. The key synthetic step was a B -alkyl Suzuki–Miyaura cross-coupling reaction. The enantiomer of ieodomycin D was also prepared using the same synthetic strategy.
海洋天然产物碘霉素 D 的合成分 7 步完成,从市售的 1-磺酸吡啶鎓总产率为 16%。关键的合成步骤是 B-烷基 Suzuki-Miyaura 交叉偶联反应。碘霉素 D 的对映异构体也使用相同的合成策略制备。