摘要 |
PCT No. PCT/CH93/00026 Sec. 371 Date Sep. 27, 1993 Sec. 102(e) Date Sep. 27, 1993 PCT Filed Feb. 1, 1993 PCT Pub. No. WO93/15091 PCT Pub. Date Aug. 5, 1993.Novel, racemic and optically active phosphorus compounds of the formula <IMAGE> I wherein R signifies lower alkyl or lower alkoxy and R1 represents lower alkyl, cycloalkyl or substituted phenyl, are described. The compounds of formula I are useful in the form of complexes with a metal of Group VIII as catalysts for asymmetric hydrogenations and for enantioselective hydrogen displacements in prochiral allylic systems. |