TY - JOUR
T1 - New chiral 2,2′:6′,2″-terpyridine ligands from the chiral pool
T2 - Synthesis, crystal structure of a rhodium complex and uses in copper- and rhodium-catalyzed enantioselective cyclopropanation of styrene
AU - Kwong, Hoi-Lun
AU - Wong, Wing-Leung
AU - Lee, Wing-Sze
AU - Cheng, Leung-Shi
AU - Wong, Wing-Tak
PY - 2001/10/30
Y1 - 2001/10/30
N2 - A number of chiral C2-symmetric 2,2′:6′,2″ terpyridines L1-L4 were synthesized in moderate to good yields from commercially available chiral materials. Copper(II) and rhodium(III) chloride complexes of these ligands were prepared in good yields. The Rh(L2)Cl3 complex was isolated as a yellow crystalline solid and characterized by X-ray crystallography. Both Cu(L)(OTf)2 and Rh(L)(OTf)3 were found to be active catalysts in the cyclopropanation of styrene with ethyl diazoacetate. Enantioselectivity up to 82% e.e. was observed. © 2001 Elsevier Science Ltd. All rights reserved.
AB - A number of chiral C2-symmetric 2,2′:6′,2″ terpyridines L1-L4 were synthesized in moderate to good yields from commercially available chiral materials. Copper(II) and rhodium(III) chloride complexes of these ligands were prepared in good yields. The Rh(L2)Cl3 complex was isolated as a yellow crystalline solid and characterized by X-ray crystallography. Both Cu(L)(OTf)2 and Rh(L)(OTf)3 were found to be active catalysts in the cyclopropanation of styrene with ethyl diazoacetate. Enantioselectivity up to 82% e.e. was observed. © 2001 Elsevier Science Ltd. All rights reserved.
UR - http://www.scopus.com/inward/record.url?scp=0035976081&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0035976081&origin=recordpage
U2 - 10.1016/S0957-4166(01)00431-1
DO - 10.1016/S0957-4166(01)00431-1
M3 - RGC 21 - Publication in refereed journal
SN - 0957-4166
VL - 12
SP - 2683
EP - 2694
JO - Tetrahedron Asymmetry
JF - Tetrahedron Asymmetry
IS - 19
ER -