Protecting-Group Directed Stereoselective Intramolecular Nozaki-Hiyama-Kishi Reaction: A Concise and Efficient Total Synthesis of Amphidinolactone A
作者:Debendra K. Mohapatra、Pragna P. Das、Manas R. Pattanayak、Gaddamanugu Gayatri、G. Narahari Sastry、J. S. Yadav
DOI:10.1002/ejoc.201000565
日期:2010.9
A convergent total synthesis of amphidinolactone A, a cytotoxic macrolide from the cultured dinoflagellate Amphidinium sp., is described in 13 linear steps. The key step in the synthetic sequence involves an intramolecular Nozaki― Hiyama―Kishi (NHK) reaction for the construction of the 13-membered lactone ring by union of two fragments derived from a single chiral epoxide. The stereochemical outcome
在 13 个线性步骤中描述了 amphidinactone A 的收敛全合成,这是一种来自培养的鞭毛藻 Amphidinium sp. 的细胞毒性大环内酯。合成序列中的关键步骤涉及分子内 Nozaki-Hiyama-Kishi (NHK) 反应,用于通过从单个手性环氧化物衍生的两个片段的结合来构建 13 元内酯环。NHK 反应的立体化学结果已得到计算研究的支持。