Highly Efficient Total Synthesis of the Marine Natural Products (+)-Avarone, (+)-Avarol, (−)-Neoavarone, (−)-Neoavarol and (+)-Aureol
作者:Junji Sakurai、Takamasa Oguchi、Kazuhiro Watanabe、Hideki Abe、Syu-ichi Kanno、Masaaki Ishikawa、Tadashi Katoh
DOI:10.1002/chem.200701386
日期:2008.1.18
Biologically important and structurally unique marine natural products avarone (1), avarol (2), neoavarone (3), neoavarol (4) and aureol (5), were efficiently synthesized in a unified manner starting from (+)-5-methyl-Wieland-Miescher ketone 10. The synthesis involved the following crucial steps: i) Sequential BF(3)Et(2)O-induced rearrangement/cyclization reaction of 2 and 4 to produce 5 with complete stereoselectivity
从(+)-5-甲基- Wieland-Miescher酮10.合成涉及以下关键步骤:i)顺序进行BF(3)Et(2)O诱导的2和4的重排/环化反应,以高收率产生5个具有完全立体选择性的5(2-> 5和4-> 5);ii)酚类化合物6和8的战略性萨尔玛氨酸氧化,得到相应的醌1和3(6-> 1和8-> 3);iii)用溴化物11进行10的桦木还原烷基化反应,以构建必要的碳骨架12(10 + 11-> 12)。