Importance of the term 'enantiomeric ratio' for comparison of chiral catalysts in prochiral substrate reactions

Enantiomer

Volumn 2, Issue 5, 1997, Pages 415-419

  Selke, Rüdiger ^a  

^a UNIVERSITY OF ROSTOCK   (Germany)

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[No Author keywords available]

Indexed keywords

EID: 0004279686     PISSN: 10242430     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Review

References (14)

1. K. Faber, Enantiomer, 1997 2, preceding paper.
2. The term q for enantiomeric ratio of two enantiomers A/ B, given as one numeral, was introduced by us for application in calculation of the "relative enantioselectivity" Q being very useful for comparison of the enantioselectivities of two catalysts of different structure or for comparison of a modified with a standard experiment: R. Selke, C. Facklam, H. Foken and D. Heller, Tetrahedron: Asymmetry, 1993, 3, 369-382, see there related literature given under [2-6].
3. The abbreviation er for enantiomer ratio of two enantiomers (given in two numerals A : B) was introduced for more clarity after a longer use without such an abbreviation: D. Seebach, A.K. Beck, B. Schmidt and Y.M. Wang, Tetrahedron, 1994, 50, 4363-4384;
4. see also B. Weber and D. Seebach, Angew. Chem., 1992 104, 96;
5. Angew. Chem. Int. Ed. Engl., 1992. 31, 84.
6. C.-S. Chen, Y. Fujimoto, G. Girdaukas and C.J. Sih, J. Am. Chem. Soc., 1982, 104, 7294. One reason for confusion may be that in this excellent publication the same abbreviation E is disadvantageously also used for enantiotopically selective reactions of prochiral substrates.
7. H.B. Kagan, Recl. Trav. Chim Pays-Bas, 1995, 114, 203.
8. V. Schurig, Enantiomer, 1996, 1, 139.
9. R. Selke, M. Ohff and A. Riepe, Tetrahedron, 1996, 52, 15079;
10. A. Kumar, G. Oehme, J.P. Roque, M. Schwarze and R. Selke, Angew. Chem., 1996, 106, 2272;
11. Angew. Chem. Int. Ed. Engl., 1994, 33, 2197.
12. U. Berens and R. Selke, Tetrahedron: Asymmetry, 1996, 7, 2055.
13. D. Heller, H. Buschmann and H.-D. Scharf, Angew. Chem., 1996, 108, 1964;
14. Angew. Chem. Int. Ed. Engl., 1996, 35, 1852.