摘要 |
<p>Described are racemic optically active phosphorus compounds of the formula (I), in which R is a lower alkyl or lower alkoxy group and R<1> is a lower alkyl, cycloalkyl or substituted phenyl group. The compounds of the formula (I) act, in the form of complexes with a group (IV) metal, as catalysts for asymmetric-hydrogenation reactions and enantiomer-selective hydrogen-displacement reactions in prochiral allylic systems.</p> |