Chiral ionic liquids
OwnerPeter Wasserscheid, Wilhelm Keim +2inventors
InventorsPeter Wasserscheid, Wilhelm Keim, Carsten Bolm, Andreas Bosmann
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OwnerPeter Wasserscheid, Wilhelm Keim +2inventors
InventorsPeter Wasserscheid, Wilhelm Keim, Carsten Bolm, Andreas Bosmann
Estimating the term…
The invention relates to chiral ionic liquids of the general formula [A]n+[Y]n−, whereby n=1 or 2, the anion [Y]n− is the anion of an organic or inorganic proton acid and the cation [A]+ an optically active organic ammonium cation with up to 50 carbon atoms, at least one chirality center and at least one functional group that can produce a co-ordination by forming hydrogen bridges or by providing free electron pairs. At least one chirality center is provided with a distance of up to 5 atomic bonds from the functional group. The invention also relates to a method for producing said chiral ionic liquids and to the use thereof in methods for the asymmetric synthesis, the asymmetric catalysis and for separating racemates.
Chiral ionic liquids of the general formula
Chiral ionic liquids as claimed in any one of the foregoing claims, characterized in that the anion [Y]n− of the organic or inorganic proton acid is selected from the group comprising fluoride, chloride, bromide, iodide, nitrate, HSO4−, H2PO4−, HPO42−, bis-(trifluoromethane sulfone)-imidate, tetrafluoroborate ([BF4]−), tetrachloroborate ([BCl4]−), hexafluorophosphate ([PF6]−), hexafluoroantimonate ([SbF6]−), hexafluoroarsenate ([AsF6]−), tetrachloroaluminate ([AlCl4]−), trichlorozincate [(ZnCl3]−), dichlorocuprate, sulfate ([SO4]2−), carbonate ([CO3]2−), fluorosulfonate, [R′—COO]−, [R′—SO3]− or [(R′—SO2)2N]−, whereby R′ is a linear or branched aliphatic or alicyclic alkyl or C5-C18 aryl, C5-C18-aryl-C1-C6-alkyl or C1-C6-alkyl-C5-C18-aryl radical containing 1 to 12 carbon atoms, which may be substituted by halogen atoms.
Chiral ionic liquids as claimed in any one of the foregoing claims, characterized in that [A]+ is selected from the group comprising
Dependencies are inferred from the claim text.