Facial selectivities in the nucleophilic additions of 2,3-unsaturated 3-arylsulfinyl pyranosides

- Conjugate addition patterns on newer sugar vinyl sulfoxides are reported.
- Sugar vinyl sulfoxides undergo conjugate addition reactions diastereoselectively.
- The nature of nucleophile and substituent at the sulfinyl sulfur are important.
- Primary amines, carbon and sulfur nucleophiles prefer axial addition pattern.
- Whereas secondary amine nucleophiles prefer equatorial addition pattern.