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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Synthesis and application of the first planar chiral strong brønsted acid organocatalysts.

The synthesis of planar chiral strong Brønsted acid organocatalysts derived from [2.2]paracyclophane is described. Resolution was accomplished according to a modified protocol involving pseudo-ortho-substituted [2.2]paracyclophane-based sulfoxides for the synthesis of three new sulfonic acids. The first planar chiral phosphoric acid diester was obtained from the corresponding phenyl-substituted diol derived from enantiopure 4-bromo-12-hydroxy [2.2]paracyclophane. These new classes of catalysts were tested in an enantioselective Friedel-Crafts reaction as well as in a direct asymmetric Mannich reaction and gave yields of up to 93% and ee-values of up to 38%. Chirality, 2012. © 2012 Wiley Periodicals, Inc.[1]

References

  1. Synthesis and application of the first planar chiral strong brønsted acid organocatalysts. Enders, D., Ludwig, M., Raabe, G. Chirality (2012) [Pubmed]
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