Regioselective Synthesis of α-Functional Stilbenes via Precise Control of Rapid <i>cis</i>–<i>trans</i> Isomerization in Flow
作者:Hyune-Jea Lee、Yuya Yonekura、Nayoung Kim、Jun-ichi Yoshida、Heejin Kim
DOI:10.1021/acs.orglett.1c00538
日期:2021.4.16
The rapid cis–trans isomerization of α-anionic stilbene was regioselectively controlled by using flow microreactors, and its reaction with various electrophiles was conducted. The reaction time was precisely controlled within milliseconds to seconds at −50 °C to selectively give the cis- or trans-isomer in high yields. This synthetic method in flow was well-applied to synthesize precursors of commercial
Development and Application of a Direct Vinyl Lithiation of <i>cis</i>-Stilbene and a Directed Vinyl Lithiation of an Unsymmetrical <i>cis</i>-Stilbene
作者:Juliet Cotter、Anne-Marie L. Hogan、Donal F. O'Shea
DOI:10.1021/ol070239l
日期:2007.4.1
1-lithio-1,2-diphenylethene undergoes an in situ Z-to-E isomerization, and subsequent reaction with electrophiles results in an efficient stereoselective synthesis of trisubstituted alkenes. A directed vinyl lithiation of the unsymmetrical cis-stilbene 2-styryl-phenyl-carbamic acid tert-butyl ester can be achieved regioselectively, thereby expanding this methodology for further synthetic applications in