Asymmetric Synthesis and Structure Revision of Guignardone H and I: Development of a Chiral 1,3-Diketone Possessing <i>C</i><sub>2</sub> Symmetry
作者:Toyoharu Kobayashi、Iori Takizawa、Ayumu Shinobe、Yuichiro Kawamoto、Hideki Abe、Hisanaka Ito
DOI:10.1021/acs.orglett.9b00486
日期:2019.5.3
A novel chiral 1,3-diketone possessing C2 symmetry was synthesized and utilized in the asymmetric synthesis of guignardone H and I by employing sequential condensation–6π-electrocyclization reactions with the novel 1,3-diketone followed by stereoselective hydrogenation as key steps. Although the synthetic compounds differed from natural guignardone H and I, we realized that the C4-epimers of the proposed
合成了具有C 2对称性的新型手性1,3-二酮,并通过与新型1,3-二酮进行顺序缩合-6π-电环化反应,然后进行立体选择性氢化作为关键步骤,将其用于吉尼他酮H和I的不对称合成中。尽管合成的化合物不同于天然的吉尼他酮H和I,但我们意识到,吉尼他酮H和I的拟议结构的C4表位是实际的结构。