Combined Rhodium-Catalyzed Carbon-Hydrogen Activation and β-Carbon Elimination to access Eight-Membered Rings
作者:Damien Crépin、James Dawick、Christophe Aïssa
DOI:10.1002/anie.200904527
日期:2010.1.12
Enlarge! CH bond activation and β‐carbon elimination are combined in a net intramolecular hydroacylation of alkylidenecyclobutanes and alkylideneazetidines in the presence of rhodium catalysts, affording eight‐membered‐ring compounds in high yield (see scheme). This study demonstrates the possibility of exploiting the strain energy of azetidines through β‐carbon elimination in new transition‐metal‐catalyzed
放大!Ç H键活化和β-碳消除被组合在在铑催化剂的存在下alkylidenecyclobutanes和alkylideneazetidines的净分子内加氢酰化,得到八元环的化合物以高收率(参见方案)。这项研究证明了在新的过渡金属催化反应中通过消除β-碳来利用氮杂环丁烷的应变能的可能性。