TY - JOUR
T1 - Synthesis of Rh(I) diamine complexes and their exploitation for asymmetric hydrogen transfer processes
AU - Jones, M D
AU - Mahon, M F
N1 - ID number: ISI:000256497600022
PY - 2008
Y1 - 2008
N2 - In this paper, we report the synthesis and characterisation of two novel chiral diamine ligands and three new Rh( I) complexes. The diamine ligands were prepared by reducing the Schiff base precursors using NaBH4. Unusually, when ligand 2 was recrystallised in a methanol: acetone solution ( 10: 1) a five membered imidazolidine ring was formed, as confirmed by X-ray crystallography, multinuclear NMR spectroscopy and mass spectrometry. The Rh( I) cationic complexes were prepared in high yields and purities and these have been exploited for the asymmetric reduction of acetophenone to 1-phenylethanol. Modest conversions ( up to 88%) and enantioselectivities ( up to 50%) have been achieved. (C) 2008 Elsevier B. V. All rights reserved.
AB - In this paper, we report the synthesis and characterisation of two novel chiral diamine ligands and three new Rh( I) complexes. The diamine ligands were prepared by reducing the Schiff base precursors using NaBH4. Unusually, when ligand 2 was recrystallised in a methanol: acetone solution ( 10: 1) a five membered imidazolidine ring was formed, as confirmed by X-ray crystallography, multinuclear NMR spectroscopy and mass spectrometry. The Rh( I) cationic complexes were prepared in high yields and purities and these have been exploited for the asymmetric reduction of acetophenone to 1-phenylethanol. Modest conversions ( up to 88%) and enantioselectivities ( up to 50%) have been achieved. (C) 2008 Elsevier B. V. All rights reserved.
UR - http://www.scopus.com/inward/record.url?scp=44649111148&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2008.04.020
DO - 10.1016/j.jorganchem.2008.04.020
M3 - Article
SN - 0022-328X
VL - 693
SP - 2377
EP - 2382
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 13
ER -