Masked P(iii)/P(v) frustrated Lewis pairs for C–H and X–H bond cleavage and catalytic hydroarylation of alkenes

Abstract

Frustrated Lewis pairs (FLPs) have been realized for a wide range of element combinations, yet systems constructed from two phosphorus centers in distinct oxidation states remain unexplored. Here, we report an intramolecular dative R₃P → PR₄⁺ bond that functions as a masked FLP. The architecture enables the heterolytic activation of C–H and X–H bonds (X = O, N), affording phosphonium/phosphorane products. The cooperative reactivity is further exploited in the hydroarylation of alkenes, demonstrating how P–P frameworks featuring mixed phosphorus oxidation states can be harnessed for main-group catalysis.