Silylated ferrocenyldiphosphines, silylated ferrocenyldiphosphines bound to inorganic or polymeric organic supports and also metal complexes thereof, their preparation and uses
AssigneeNovartis AG
InventorBenoit Pugin
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Abstract
The invention relates to ferrocenyldiphosphine ligands containing a silylene group, ferrocenyldiphosphines bound to inorganic or polymeric organic supports by this silylene group, their preparation and also their metal complexes with transition metals such as rhodium or iridium. The invention also relates to the use of these complexes for hydrogenating organic double or triple bonds, in particular olefinic double bonds and carbon-heteroatom double bonds. The complexes are particularly suitable for enantioselective hydrogenation using chiral diphosphines and prochiral unsaturated compounds.
Claims5
A complex of rhodium or iridium with an inorganic or organic polymeric support material to which are bound ferrocenyldiphosphines in which the 1 and 2 positions of one cyclopentadienyl ring bear tertiary phosphine groups of which one is bound directly and the other via a group CHR.sub.1 to the cyclopentadienyl ring and the other cyclopentadienyl radical bears a silylene group --Si(R.sub.12).sub.2 --R.sub.13 --A--, bonded via the Si atom, which forms one end of an organic bridging group and at the other end of which the inorganic or polymeric organic support is bound via the group A, directly or via an additional group,
- in which
- A is NH or N(C.sub.1 -C.sub.12 alkyl);
- R.sub.12 are identical or different radicals and are, independently of one another, C.sub.1 -C.sub.12 alkyl, C.sub.3 -C.sub.7 cycloalkyl, benzyl or phenyl or together are C.sub.6 -C.sub.12 alkylene;
- and
- R.sub.13 is C.sub.1 -C.sub.12 alkylene or phenylene.
Dependencies are inferred from the claim text.