Stereoselective Total Synthesis of (+)-Giganin and Its C10 Epimer by Using Late-Stage Lithiation-Borylation Methodology
作者:Catherine J. Fletcher、Katherine M. P. Wheelhouse、Varinder K. Aggarwal
DOI:10.1002/anie.201208403
日期:2013.2.25
The first total synthesis of (+)‐giganin and its unnatural diastereoisomer (+)‐C10‐epi‐giganin has been completed in a total of 13 linear steps, and 7 % and 8 % overall yield, respectively (see scheme; (‐)‐sp= (‐)‐sparteine, (+)‐sps=(+)‐sparteine surrogate). Lithiation–borylation methodology has been successfully applied in the key step, to couple together advanced intermediates with very high diastereoselectivity
(+)-ganganin及其非天然非对映异构体(+)-C10- epi -giganin的第一次总合成已完成总共13个线性步骤,总产率分别为7%和8%(参见方案;(- )-sp =(-)-sparteine,(+)-sps =(+)-sparteine代表)。锂基化方法已成功应用于关键步骤,将非对映选择性极高的高级中间体偶联在一起,从而证明了其作为总合成工具的能力。