Asymmetric cyclopropanation in ionic liquids promoted by dicopper complexes of ditopic ligands
作者:José I. García、Clara I. Herrerías、Beatriz López-Sánchez、José A. Mayoral、Ana C. Miñana
DOI:10.1016/j.tetasy.2014.04.017
日期:2014.5
complexes of ditopic chiral ligands bearing bis(oxazoline) moieties has been explored in the enantioselective cyclopropanationreaction of styrene with ethyl diazoacetate. The recoverability of these catalytic phases has been studied using different ionic liquids and ligands. The origin of the ionic liquid is determinant both for the catalytic results and the reusability of the system.
Linking Homogeneous and Heterogeneous Enantioselective Catalysis through a Self-Assembled Coordination Polymer
作者:José I. García、Beatriz López-Sánchez、José A. Mayoral
DOI:10.1021/ol802071n
日期:2008.11.6
Combining the advantages of homogeneous and heterogeneous enantioselective catalysis is possible through self-supported copper coordination polymers, based on a new kind of ditopic chiralligand bearing two azabis(oxazoline) moieties. When the coordination polymer is used to catalyze a cyclopropanation reaction, it becomes soluble in reaction conditions but precipitates after reaction completion, allowing