A pincer palladium-catalyzed asymmetric 1,4-addition of diarylphosphines to α,β-unsaturated sulfonamides was realized for the synthesis of chiral sulfonamide phosphines with up to 98% ee under mild conditions.
Key words
α,β-unsaturated sulfonamides - asymmetric 1,4-addition - pincer palladium catalyst - chiral phosphine