Studies toward a Marine Toxin Immunogen: Enantioselective Synthesis of the Spirocyclic Imine of (−)-Gymnodimine
作者:Ke Kong、Ziad Moussa、Daniel Romo
DOI:10.1021/ol051840r
日期:2005.11.1
copper-bis(oxazoline) complex was utilized to construct a highly functionalized spirolactam, a key intermediate in our projected total synthesis of the marine toxin, gymnodimine. Additional transformations, including a mild N-tosyl group deprotection, afforded a keto spirocyclic imine moiety, the proposed pharmacophore of gymnodimine. Thus, the prepared ketone is a potentially useful intermediate for conjugation
[反应:见正文]利用Evans的铜-双(恶唑啉)络合物催化的对映选择性Diels-Alder反应,构建了高度官能化的螺内酰胺,螺环内酰胺是我们预计的海洋毒素Gymnodimine全面合成的关键中间体。其他转化,包括温和的N-甲苯磺酰基脱保护,提供了一个酮螺环亚胺部分,这是裸鼠亚胺的拟议药效基团。因此,制备的酮是潜在有用的缀合中间体,以提供用于最终监测裸子草胺和同类物的免疫原。