Reversal of enantioselectivity using catalysts containing multiple stereogenic centres
作者:Alexander J.A. Cobb、Charles M. Marson
DOI:10.1016/s0957-4166(01)00290-7
日期:2001.7
N-methylation of ligands with multiple stereogenic centres is shown to provide the product of the opposite configuration in significant enantiomeric excess (e.e), in the addition of diethylzinc to aldehydes. The catalysts possess stereogenic centres appended to a trans-1,2-cyclohexanediamine core. (C) 2001 Elsevier Science Ltd. All rights reserved.
Novel Chiral Amide Hosts Derived from Mandelic Acid: A Marked Difference in Inclusion Abilities between Host Stereoisomers
Asymmetric synthesis using catalysts containing multiple stereogenic centres and a trans-1,2-diaminocyclohexane core; reversal of predominant enantioselectivity upon N-alkylation
作者:Alexander J.A. Cobb、Charles M. Marson
DOI:10.1016/j.tet.2004.11.030
日期:2005.1
N-Methylation of ligands containing a trans-1,2-diaminocyclohexane core and multiple stereogeniccentres is shown to provide the product of the opposite configuration in significant enantiomeric excess, in the addition of diethylzinc to aldehydes. Some of the ligands were effective in an asymmetric Michael addition.