The Application of New Chiral Ferrocene Ligands in Asymmetric Transfer Hydrogenation of Ketones ()
ABSTRACT
Four
easily available ferrocenyl chiral ligands have been screened firstly for ruthenium
(II)-catalyzed asymmetric transfer hydrogenation of acetophenone with HCOOH/Et3N
azeotrope as the hydrogen source. A moderate chemical yield of 1-phenylethanol
with 83% ee was obtained when (RC, SFc)-1-(Diphe-nylphosphino)-2-[1-N-(3-methylpyridin-2-ylmethyl) ethyl]
ferrocene (L1) was used. Particularly, both ruthenium and
iridium could coordinate with L1 to accomplish the asymmetric
reduction of series of aromatic ketones separately. The desired
products were achieved with up to 86% ee.<
Share and Cite:
Mo, Y. , Wang, Q. , Nie, H. and Wang, Q. (2018) The Application of New Chiral Ferrocene Ligands in Asymmetric Transfer Hydrogenation of Ketones.
International Journal of Organic Chemistry,
8, 54-83. doi:
10.4236/ijoc.2018.81004.
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