作者:Kazuhiro Tsuna、Naoyoshi Noguchi、Masahisa Nakada
DOI:10.1002/chem.201204119
日期:2013.4.22
The enantioselective total synthesis of (+)‐ophiobolin A is described. This total synthesis features the construction of the spiro CD ring of (+)‐ophiobolin A through a stereoselective intramolecular Hosomi–Sakurai cyclization reaction, the joining of the A ring to the CD ring by using a reaction reported by Utimoto, and the construction of the ophiobolin eight‐membered carbocyclic ring through ring‐closing
描述了(+)-ophiobolin A的对映选择性全合成。这种全合成的特征是通过立体选择性分子内Hosomi-Sakurai环化反应来构建(+)-ophiobolin A的螺旋CD环,利用Utimoto报道的反应将A环连接至CD环,以及构建ophiobolin通过闭环复分解(RCM)进行的八元碳环,这是本研究中首次进行。该成功的RCM反应需要使用在C5位含有苄氧基或甲氧基甲氧基且在C6位含有异丙烯基或其羟基化形式的底物。