Formal allylic C(sp3)–H alkylation of α-alkylstyrenes by rearrangement of intermediate alkenyl sulfonium salts

Allylic C(sp 3 )–H alkylation of α-alkylstyryl sulfonium salts based on [2,3]-sigmatropic rearrangement strategies has been developed. This protocol could allow facile access to allylated carbon quaternary centers in moderate to good yields.