Abstract
Water-soluble analogues of Noyori's (1S,2S)-N-(p-tolylsulfonyl)-1,2-diphenylethylenediamine and Knochel's (1R,2R)-N-(p-tolylsulfonyl)-1,2-diaminocyclohexane, containing an additional sulfonic acid group, have been synthesised. The ruthenium catalysed reduction of aromatic ketones using enantiomerically pure catalyst derived from water soluble ligands and [RuCl2(p-cymene)](2) has been examined. High enantioselectivity and moderate activity were observed in the 2-propanol/base system. The addition of water is necessary to stabilise the catalyst. (C) 2001 Elsevier Science Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 4037-4039 |
Number of pages | 3 |
Journal | Tetrahedron Letters |
Volume | 42 |
Issue number | 24 |
Publication status | Published - 2001 |