Hb. Kagan, Various aspects of the reaction of a chiral catalyst or reagent with a racemic or enantiopure substrate, TETRAHEDRON, 57(13), 2001, pp. 2449-2459
A chiral catalyst or reagent may be used to create an asymmetric center on
the components of a racemic mixture. The quantitative relationships between
the various experimental data (ee's, fractional amounts of products, conve
rsion) are given, and extended to the formation of regioisomeric products.
The cases when products are not isomeric are also considered. The meaning o
f 'kinetic resolution' in these processes is discussed. Finally, it is show
n that above results can be used to safely predict the behavior of a chiral
substrate versus either enantiomers of a chiral catalyst or reagent. Indee
d, regio-, diastereo- or chemoselective reactions on a chiral substrate can
be achieved by the choice of the absolute configuration of an external chi
ral controller. (C) 2001 Elsevier Science Ltd. All rights reserved.