Vinylhalides react with MeSeLi in DMF to afford vinyl methyl selenides which are demethylated by the excess of the MeSeLi; the vinyl selenide anions thus obtained react with acetyl chloride to give vinyl acetyl selenides. This three steps one pot synthesis occurs with complete retention of configuration. The vinyl acetyl selenides are cleanly fragmented by electron transfer to the vinyl selenide anions;
A Stereoselective Synthesis of (E)-Divinyl Diselenides and (E)-Divinyl Ditellurides
作者:Xian Huang、Jun-Hua Wang
DOI:10.1080/00397910008087322
日期:2000.1
Insertion of elemental selenium or tellurium into the Csp(2)-Zr bond of alkenylchlorozirconocenes followed by oxidation in air affords (E)-divinyl diselenides or (E)-divinyl ditellurides.