Intermediates for the synthesis of bisphosphine compounds

Details Intermediates for the synthesis of bisphosphine compounds Intermediates for the synthesis of bisphosphine compounds

1996-09-16

1998-04-14

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30791

Patent

active

057393605

ABSTRACT:
The invention relates to novel bisphosphonates and to processes for their preparation and for their resolution into the enantiomers. The bisphosphonates according to the invention are valuable intermediates for the preparation of bisphosphine compounds, especially chiral bisphosphine ligands. These in turn are constituents of transition metal complexes which are used as catalysts inter alia in asymmetric hydrogenation.
The novel bisphosphonates have the general formula (I) ##STR1## in which R.sup.1 is linear or branched alkyl having up to 6 carbon atoms, aryl or aralkyl, each of which can optionally be substituted, or two radicals R.sup.1 together are a bridging hydrocarbon radical having up to 6 carbon atoms,

REFERENCES:
patent: 5274167 (1993-12-01), Lange et al.
patent: 5302738 (1994-04-01), Foricher et al.
patent: 5510503 (1996-04-01), Laue et al.

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