Process for the preparation of optically active carbon compounds
AssigneeStudiengesellschaft Kohle mbH
InventorsGunther Wilke, Borislav Bogdanovic, Horst Pauling
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Abstract
Optically active compounds are prepared from optically inactive unsaturated hydrocarbons by reacting at least one unsaturated hydrocarbon in the presence of a catalyst prepared by combining a nickel compound, a Lewis acid and an optically active phosphine of the general formula PR'R"R'" in which R', R" and R' " are hydrocarbon radicals, thereby forming optically active compounds having chiral centers formed by the carbon-to-carbon linkages. The optically active compounds can be polymerized to provide optically active polymers.
Claims8
Process for preparing optically active compounds which comprises reacting optically inactive unsaturated olefinic compounds at a temperature from -120.degree. to +100.degree.C in the presence of a catalyst prepared by combining a nickel compound selected from the group consisting of nickel halides, nickel salts of organic acids, nickel alcoholates, nickel enolates, nickel phenolates and .pi.-allyl nickel halides, a Lewis acid selected from the group consisting of aluminum alkyls, aluminum alkyl halides and aluminum halides and an optically active phospine having the formula
- PR'R"R'"
- wherein R', R" and R'" are paraffinic, naphthinic, olefinic acetylinic or aromatic hydrocarbon radicals, said optically active phosphine being:
- A. one wherein the phosphorus atom has a chiral center, in which case R', R" and R'"0 represent three different radicals which are bonded to the phosphorus and one of the enantiomers thereof has been obtained by racemate cleavage;
- or
- B. one wherein one of said radicals itself is optically active and in turn is bonded to the phosphorus atom to form a compound PR*.sub. 3.sub.-n R.sub.n wherein R* is an optically active hydrocarbon radical,
- thereby forming optically active compounds having chiral centers formed by the carbon-to-carbon linkages.
Dependencies are inferred from the claim text.