PuPHOS and CamPHOS Ligands in the Intermolecular Catalytic Pauson–Khand Reaction
作者:Agustí Lledó、Jordi Solà、Xavier Verdaguer、Antoni Riera、Miguel A. Maestro
DOI:10.1002/adsc.200700145
日期:2007.9.3
intermolecular cobalt-catalyzed Pauson–Khandreaction is described. The use of the hemilabile CamPHOS ligand provides good conversions and selectivity up to 28 % ee. The catalytic process was studied by in situ FT-IR and it was found that both bridged and non-bridged complexes were present in the reaction mixture. Our results suggest that recognition between the alkyne substrate and the ligand is essential to attain