Total Synthesis of Wasabidienones B1 and B0 via SIBX-Mediated Hydroxylative Phenol Dearomatization
摘要:
The first total synthesis of the natural nondimerizing o-quinol (+)-wasabidienone B-1 was achieved from commercially available 1,3,5-trimethoxybenzene. The key dearomatizing transformation was efficiently accomplished via a hydroxylative phenol dearomatization reaction using the stabilized lambda(5)-iodane reagent IBX (SIBX). (+)-Wasabidienone B-1 was then converted into its congener (-)-wasabidienone B-0 via an improved thermally induced ring-contracting isomerization reaction.
A new natural cyclopentenone derivative has been isolated from the potato culture solution of Phoma wasabiae, and its structure was determined to be (5S*)-5-acetyl-3,5-dimethoxy-2-methyl-(4R*)-4-[(2R*)-2-methylbutanoyl]-2-cyclopenten-1-one by spectroscopic and single crystal X-ray diffraction analyses.
通过光谱和单晶 X 射线衍射分析,从马铃薯瘤培养液中分离出一种新的天然环戊烯酮衍生物,并确定其结构为 (5S*)-5- 乙酰基-3,5-二甲氧基-2-甲基-(4R*)-4-[(2R*)-2-甲基丁酰基]-2-环戊烯-1-酮。
Total Synthesis of Wasabidienones B<sub>1</sub> and B<sub>0</sub> via SIBX-Mediated Hydroxylative Phenol Dearomatization
作者:Laurent Pouységu、Mélanie Marguerit、Julien Gagnepain、Gildas Lyvinec、Andrew J. Eatherton、Stéphane Quideau
DOI:10.1021/ol802183p
日期:2008.11.20
The first total synthesis of the natural nondimerizing o-quinol (+)-wasabidienone B-1 was achieved from commercially available 1,3,5-trimethoxybenzene. The key dearomatizing transformation was efficiently accomplished via a hydroxylative phenol dearomatization reaction using the stabilized lambda(5)-iodane reagent IBX (SIBX). (+)-Wasabidienone B-1 was then converted into its congener (-)-wasabidienone B-0 via an improved thermally induced ring-contracting isomerization reaction.