The present invention relates to a use of a cyclic imidate as a ligand for catalysis in which the ligand contains sub-structure (Y) as a minimal structural motive, wherein the carbon atoms and the nitrogen atom can be optionally substituted by a chemical substituent.
Chiral imidates as a new class of nitrogen-based chiral ligands: synthesis and catalytic activity in asymmetric aziridinations and diethylzinc additions
作者:Timothy Noël、Koen Vandyck、Koen Robeyns、Luc Van Meervelt、Johan Van der Eycken
DOI:10.1016/j.tet.2009.08.028
日期:2009.10
Chiral imidates were efficiently synthesized in one step and with high yields (seven examples). These chiral imidates were used as ligands in the Cu(I)-catalyzed asymmetric aziridination of methyl cinnamate and in the asymmetricdiethylzincadditions to benzaldehyde as a proof of principle. The imidate catalyst system showed high catalytic activities and induced encouraging selectivities. An X-ray
Determination of the Absolute Configuration of Three <i>as</i>-Hydrindacene Compounds by Vibrational Circular Dichroism
作者:T. Kuppens、K. Vandyck、J. Van der Eycken、W. Herrebout、B. J. van der Veken、P. Bultinck
DOI:10.1021/jo050666h
日期:2005.11.1
The absoluteconfigurations of three compounds with a rigid 1,8-disubstituted as-hydrindacene skeleton have been determined using vibrational circulardichroism spectroscopy and quantum chemical calculations. Experimental spectra were compared to B3LYP/6-31G* and B3LYP/cc-pVTZ level predicted spectra. Based on the agreement between the predicted and experimental spectra, the stereochemistry could be