Selective Magnesiation or Zincation of Highly Functionalized Alkenes and Cycloalkenes Using 2,2,6,6-Tetramethylpiperidyl Bases
作者:Tomke Bresser、Paul Knochel
DOI:10.1002/anie.201006641
日期:2011.2.18
Smooth and mild: Mg or Zn TMP bases (TMP=2,2,6,6‐tetramethylpiperidyl) allow the smooth metalation of various types of polyfunctional unsaturated substrates. Several sensitive functional groups such as ester, nitro, or trifluoromethylcarbonyl groups are tolerated. The new Zn or Mg intermediates undergo acylation, allylation, or cross‐coupling reactions in satisfactory yields.
光滑温和:Mg或Zn TMP碱(TMP = 2,2,6,6-四甲基哌啶基)可使各种类型的多官能不饱和底物平滑金属化。容许一些敏感的官能团,例如酯,硝基或三氟甲基羰基。新的Zn或Mg中间体以令人满意的收率进行酰化,烯丙基化或交叉偶联反应。