Thiolation of NHC-boranes: influence of the substitution at boron

Abstract : Several N-Heterocyclic Carbene (NHC)-boryl sulfides with B-substituents were prepared. The added steric hindrance leads to much improved selectivities as only the NHC-boryl mono-sulfides were obtained. The B-substituted NHC-boranes are also conducive to more selective S to N NHC-boryl shift, provided that the NHC used is not too sterically demanding.
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Anne-Laure Vallet, Emmanuel Lacote. Thiolation of NHC-boranes: influence of the substitution at boron. Organic and Biomolecular Chemistry, Royal Society of Chemistry, 2019, 17, pp.4234-4237. ⟨10.1039/c9ob00578a⟩. ⟨hal-02104323⟩

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