作者:Jonathan Clayden、Faye E. Knowles、Ian R. Baldwin
DOI:10.1021/ja042415g
日期:2005.3.1
metabolite (-)-isodomoic acid C, a kainoid amino acid, has been synthesized for the first time. Asymmetric dearomatizing cyclization of an aromatic amide using a chiral lithium amide base generates a bicyclic enone containing a pyrrolidinone ring with the relative and absolute stereochemistry of the target. A further 15 synthetic steps, including conjugate cuprate addition to the enone of a side chain
神经活性藻类代谢物 (-)-isodomoic 酸 C,一种类胡萝卜素氨基酸,已首次合成。使用手性氨基化锂碱对芳香族酰胺进行不对称脱芳构化环化,生成含有吡咯烷酮环的双环烯酮,其具有目标的相对和绝对立体化学。进一步的 15 个合成步骤,包括共轭铜酸盐加成到侧链前体的烯酮、Ru 促进的苯环氧化为 C2-羧酸取代基、区域选择性 Baeyer-Villiger 反应和 E-选择性 Horner- Wadsworth-Emmons 反应,将环化产物细化为目标分子。