| 摘要 |
<p>The invention is concerned with novel water-soluble racemic or optically active compounds of formulae <CHEM> wherein R<1>,R<2>, R<3> and R<4> independently signify lower alkyl or lower alkoxy; m and n are 0, 1 or 2; X signifies hydrogen, an alkali metal, the equivalent of an earth alkali metal or an ammonium ion; with the provisio that R<3> and R<4> are not located at postion 3 or 3'. The invention is also concerned with a process for the manufacture of such compounds, complexes of such compounds with a metal of Group VIII and with the use of these complexes as catalyst for asymmetric hydrogenation and for enantioselective hydrogen displacement in prochiral allylic systems.</p> |
