Anne-Laure Vallet and Emmanuel Lacôte
Org. Biomol. Chem., 2019,17, 4234-4237
DOI:
10.1039/C9OB00578A,
Communication
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.