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Chiral catalysis has turned out to be the most efficient of the strategies to obtain enantiomerically pure compounds and, as an evidence, even nature uses chiral catalysts called enzymes. On the other hand, in the last years, numerous supported chiral catalysts have been prepared to try to reproduce the results obtained with homogeneous catalysts at the same time that they provide advantages such...
Surface confinement effects are extremely important in determining the stereochemical course of cyclopropanation reactions catalyzed by C 2 -symmetric bisoxazoline–copper complexes immobilized on laponite. In the case of the PhBox ligand, complete reversal of trans/cis-diastereoselectivity is observed, as well as a reversal in the absolute configuration of the major cis-cyclopropane. Furthermore,...
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