| abstract |
New racemic and optically active phosphorus compounds are described, having the formula (I), in which R denotes lower alkyl, cycloalkyl or phenyl or substituted phenyl. The compounds of formula (I) are used, in the form of complexes with a metal from group (IV), as catalysts for asymmetric hydrogenations and for enantio-selective hydrogen transpositions in prochiral allylic systems. |