TY - JOUR
T1 - Strong Electronic Effects on Enantioselectivity in Rhodium‐Catalyzed Hydroborations with Novel Pyrazole‐Containing Ferrocenyl Ligands
AU - Schnyder, Anita
AU - Hintermann, Lukas
AU - Togni, Antonio
PY - 1995/5/2
Y1 - 1995/5/2
N2 - The highest enantioselectivity yet for a hydroboration (98% ee) was achieved with the ferrocenyl ligand 1, R1 = R3 = Me, R2 = H, Ar = 4CF3C6H4, in the Rh‐catalyzed reaction of styrene with catecholborane. The influence of the substituents on both the pyrazolyl and phosphano fragments was studied, and the observations tentatively interpreted in terms of the varying electronic asymmetry they engender at the metal center. (Figure Presented.)
AB - The highest enantioselectivity yet for a hydroboration (98% ee) was achieved with the ferrocenyl ligand 1, R1 = R3 = Me, R2 = H, Ar = 4CF3C6H4, in the Rh‐catalyzed reaction of styrene with catecholborane. The influence of the substituents on both the pyrazolyl and phosphano fragments was studied, and the observations tentatively interpreted in terms of the varying electronic asymmetry they engender at the metal center. (Figure Presented.)
KW - asymmetric syntheses
KW - complexes with P,N ligands
KW - ferrocenyl ligands
KW - hydroborations
UR - http://www.scopus.com/inward/record.url?scp=33748511263&partnerID=8YFLogxK
U2 - 10.1002/anie.199509311
DO - 10.1002/anie.199509311
M3 - Article
AN - SCOPUS:33748511263
SN - 0570-0833
VL - 34
SP - 931
EP - 933
JO - Angewandte Chemie International Edition in English
JF - Angewandte Chemie International Edition in English
IS - 8
ER -