An Enantioselective Synthetic Route to Atractyligenin Using the Oxazaborolidine-Catalyzed Reduction of β-Silyl- or β-Stannyl-Substituted α,β-Enones as a Key Step
作者:E. J. Corey、Angel Guzman-Perez、Scott E. Lazerwith
DOI:10.1021/ja973034o
日期:1997.12.1
enantioselective synthetic route to the bicyclic tetraene ester 3, a key intermediate for the synthesis of the naturally occurring adenosine diphosphate transport inhibitor atractyligenin (2). The success of this route depended on the extension of the oxazaborolidine-catalyzed (CBS) reduction of an achiral β-stannyl-substituted α,β-enone (6c) to form a chiral allylic alcohol and further steps to effect simultaneous
在本文中,我们描述了双环四烯酯 3 的新型催化对映选择性合成路线,这是合成天然存在的二磷酸腺苷转运抑制剂苍术 (2) 的关键中间体。该路线的成功取决于恶唑硼烷催化 (CBS) 还原非手性 β-甲锡烷基取代的 α,β-烯酮 (6c) 以形成手性烯丙醇,以及实现手性同时转移的进一步步骤,碳环形成和四元立体中心形成,这导致了三烯酸 13。13 到 3 的转化是通过四步序列有效地进行的,包括碘内酯化、双消除和酯化。结合使用 CBS 减少适当的 α,