- Preparation of Dipyridylmethane Ligands with Pseudo-C2 Symmetry. Grafting on Polystyrenes via Transformation to Phenolic Derivatives
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Efficient grafting of dipyridylmethane ligands on highly cross-linked as well as gel-type chloromethylated polystyrenes has been achieved using phenolic derivatives of the ligands.In this way, chiral polymer-supported ligands with pseudo-C2 symmetry were obtained.The synthesis of the ligands and their grafting under mild conditions are described, as well as the preparation of monomeric models.During reduction of 6,6'-(2,2-dimethyl-1-oxopropyl) derivatives with sodium borohydride, the R,S isomers were unexpectedly formed with high selectivity.
- Levacher, Vincent,Moberg, Christina
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p. 1755 - 1762
(2007/10/02)
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