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