Studies toward (−)-Gymnodimine: Concise Routes to the Spirocyclic and Tetrahydrofuran Moieties
作者:Ju Yang、Stephen T. Cohn、Daniel Romo
DOI:10.1021/ol005510c
日期:2000.3.1
(-)-Gymnodimine is a member of a unique class of potent marine toxins possessing imines within a spirocylic array. Herein we report the synthesis of the tetrahydrofuran fragment and a strategy toward the spirocyclic imine fragment of this family of toxins. Key reactions include an asymmetric anti-aldol reaction to set the stereochemistry of the tetrahydrofuran and a formal, intermolecular Diels-Alder reaction involving an alpha-methylene-delta-lactam and a dienyne.
(-)-Gymnodimine 是一类具有独特结构的强效海洋毒素的成员,这些毒素在其螺环结构中包含亚胺。本文报告了这一类毒素中四氢呋喃片段的合成、以及针对其螺环亚胺片段的合成策略。关键反应包括:用于确立四氢呋喃立体结构的非对称反式安析尔反应,以及涉及α-甲基烯δ-内酰胺与共轭二烯炔的正式的、分子间的戴斯-阿尔德反应。