(<i>E</i>)-,(<i>Z</i>)-Parallel Preparative Methods for Stereodefined β,β-Diaryl- and α,β-Diaryl-α,β-unsaturated Esters: Application to the Stereocomplementary Concise Synthesis of Zimelidine
作者:Yuichiro Ashida、Yuka Sato、Takeyuki Suzuki、Kanako Ueno、Ken-ichiro Kai、Hidefumi Nakatsuji、Yoo Tanabe
DOI:10.1002/chem.201405150
日期:2015.4.7
Parallel and practical methods for the preparation of both (E)‐ and (Z)‐β‐aryl1‐β‐aryl2‐α,β‐unsaturated esters 1 and (E)‐ and (Z)‐α‐aryl1‐β‐aryl2‐α,β‐unsaturated esters 2 are described. These methods involve accessible, robust, stereocomplementary N‐methylimidazole (NMI)‐mediated enol tosylations (14 examples, 70–99 % yield), as well as stereoretentive Suzuki–Miyaura cross‐couplings (36 examples, 64–99 %
平行,并且两个(制备实用方法ë) -和(Ž)-β-芳1 -β -芳基2 -α,β -不饱和酯1和(ë) -和(Ž)-α -芳基1 -描述了β-芳基2 - α,β-不饱和酯2。这些方法涉及易于获得的,健壮的,立体互补的N甲基咪唑(NMI)介导的烯醇甲苯甲酸酯化(14例,产率70-99%),以及立体保持性Suzuki-Miyaura交叉偶联(36例,产率64-99%)。本协议的突出特点是使用并行和立体声互补的方法获得高度(E)和(Z)纯产物1和2通过利用顺序的烯醇甲苯磺酰化和交叉偶联反应。利用本发明方法进行了快速,平行的(E)-和(Z)-zimelidine(3)的合成,这是一种高度代表性的选择性5-羟色胺再摄取抑制剂(SSRI)。