Synthesis of the Core Structure of the Cyclocitrinols via SmI<sub>2</sub>-Mediated Fragmentation of a Cyclopropane Precursor
作者:Hans-Günther Schmalz、Sherif El Sheikh、Aike Meier zu Greffen、Johann Lex、Jörg-Martin Neudörfl
DOI:10.1055/s-2007-984521
日期:2007.7
cyclocitrinols, a new class of natural products possessing a steroid-analogue structure with a characteristic bicyclo[4.4.1]undecane AB ring system, was elaborated. In the key step, a cyclopropanated intermediate (prepared from dehydroepiandrosterone) was subjected to reductive fragmentation (using SmI 2 in THF).
详细阐述了环柠檬醇的第一个合成条目,这是一类新的天然产物,具有类固醇类似物结构和特征性双环 [4.4.1] 十一烷 AB 环系统。在关键步骤中,对环丙烷化中间体(由脱氢表雄酮制备)进行还原裂解(在 THF 中使用 SmI 2)。