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October 4, 2011Journal of the American Chemical Society199 citations

Ate Complexes of Secondary Boronic Esters as Chiral Organometallic-Type Nucleophiles for Asymmetric Synthesis

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RLRobin Larouche‐GauthierTETim G. ElfordVAVarinder K. Aggarwal

Key Points

  • To evaluate boron-ate complexes derived from secondary boronic esters and aryllithium reagents as chiral organometallic-type nucleophiles for stereocontrolled asymmetric synthesis.
  • Generated intermediate boron-ate complexes via the addition of aryllithium reagents to secondary boronic esters.
  • Reacted the chiral ate complexes with a broad range of electrophiles to functionalize the carbon–boron bond.
  • Boron-ate complexes functioned effectively as chiral nucleophiles, reacting across diverse electrophiles with stereochemical inversion.
  • Enabled stereocontrolled conversion of C–B bonds into C–I, C–Br, C–Cl, C–N, C–O, and C–C bonds with high levels of stereocontrol.

Abstract

The addition of an aryllithium reagent to a secondary boronic ester leads to an intermediate boron-ate complex that behaves as a chiral nucleophile, reacting with a broad range of electrophiles with inversion of stereochemistry. Depending on the electrophile, the C-B bond can be converted into C-I, C-Br, C-Cl, C-N, C-O, and C-C, all with very high levels of stereocontrol. This discovery now adds a new, readily available, configurationally stable, chiral organometallic-type reagent to the arsenal of methods for use in asymmetric organic synthesis.

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Cite This Study

Larouche‐Gauthier et al. (2011) studied this question.

synapsesocial.com/papers/69ede30c09d5923204fab928https://doi.org/10.1021/ja2077813
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