Optically active iridium complexes and their use

Details Optically active iridium complexes and their use Optically active iridium complexes and their use

1987-05-08

1989-08-08

Berch, Mark L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

502155, C07B 4102, C07F 1500, B01J 3122, C07D21353

Patent

active

048554324

ABSTRACT:
Optically active iridium complexes of the formula ##STR1## in which R is methyl and R.sup.1 is a hydrocarbon radical having at least one chiral C atom or a hydrocarbon radical containing at least one hetero atom and having at least one chiral C atom; or R is a hydrogen atom and R.sup.1 is 1,2-diphenylethyl or a 5-membered or 6-membered cycloaliphatic or cycloheteroaliphatic radical having at least two chiral C atoms and a phenyl group or alkyl group in the .alpha.-position, X.sup..crclbar. is an anion of a monobasic inorganic or organic acid and Y and Z are each ethylene, or Y and Z together represent an open-chain or cyclic diene which has 6 to 10 C atoms and whose diene groups are bonded via 1 or 2 C atoms.
They are suitable as enantioselective, homogeneous catalysts for the transfer hydrogenation of, in particular, prochiral ketones with secondary alcohols.

REFERENCES:
Zussinovich, Journal of Organomet Chem., 222: pp. 323-329 (1981).
Brunner, Chem. Ber., 117: pp. 1330-1354 (1984).

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