Chiral Tetraaminophosphonium Salt-Mediated Asymmetric Direct Henry Reaction
Journal of the American Chemical Society2007Vol. 129(41), pp. 12392–12393
Citations Over TimeTop 10% of 2007 papers
Abstract
Chiral tetraaminophosphonium salts 1 possessing the phosphorus-centered [5.5]-spirocyclic core have been designed and synthesized in a single step from l-valine-derived diamine. The three-dimensional molecular structure was successfully verified by the single-crystal X-ray diffraction analysis, which also identified a secondary interaction between the phosphonium cation and chloride ion via double hydrogen-bonding. The potential of this novel onium salt as a chiral organic molecular catalyst has been demonstrated in an application to asymmetric direct Henry reaction.
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