The traditional term describing the preferential formation in a chemical reaction
of one
enantiomer or
diastereoisomer over the other as a result of the influence of a
chiral feature present in the substrate,
reagent,
catalyst or environment.
Source:
PAC, 1996, 68, 2193
(Basic terminology of stereochemistry (IUPAC Recommendations 1996))
on page 2200
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1086