745079-30-5Relevant academic research and scientific papers
The role of binding constants in the efficiency of chiral catalysts immobilized by electrostatic interactions: The case of azabis(oxazoline)-copper complexes
Fraile, Jose M.,Garcia, Jose I.,Herrerias, Clara I.,Mayoral, Jose A.,Reiser, Oliver,Socuellamos, Antonio,Werner, Heiko
, p. 2997 - 3005 (2007/10/03)
As shown by theoretical calculations, azabis(oxazoline)-copper complexes are considerably more stable than the analogous bis(oxazoline)-copper complexes. This enhanced stability allows them to be efficiently immobilized by means of electrostatic interactions to different anionic supports, such as clays and nafion-silica nanocomposites, without the loss of a ligand, as is observed for bis(oxazolines). As a result, enantioselectivities of around 90% ee are obtained in the cyclopropanation reaction between styrene and ethyl diazoacetate. Moreover, the solid catalyst is easily recoverable.
