Phase transfer of enantiopure Werner cations into organic solvents: an overlooked family of chiral hydrogen bond donors for enantioselective catalysis.
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abstract
A study was conducted to investigate phase transfer of ennantiopure Werner cations into organic salts and their use as donors for chiral hydrogen enantioselective catalysis for organic reactions. The study involved developing an extensive aqueous chemistry of these salts and analogues with other diamines. An aqueous solution of a salt derived from racemic trans-1,2-cyclohexanediamine was treated with with a CH2Cl2 solution of NaBAr f. It was observed that the aqueous phase decolorized, while an identical reaction gave an identical (Co(rac-chnx)3)(BAr f)3 in 89% yield as a nonhydrate.
