diastereoselectivity

https://doi.org/10.1351/goldbook.08162
Preferential formation in a chemical reaction of one diastereoisomer over another.
Note:
This can be expressed quantitatively by the diastereoisomeric excess or by the diastereomeric ratio, which is preferable because it is more closely related to a Gibbs-energy difference.
Source:
PAC, 2022, 94, 353. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)) on page 401 [Terms] [Paper]