Mono-and 2, 2′-disubstituted terminal alkenes can be isomerized into the more stable internal (Z)-and (E)-alkenes by treating them with catalytic amounts of [(allyl) PdCl] 2 or [(allyl) NiBr] 2, a triarylphosphine, and silver triflate at room temperature. The isomeric ratio (E: Z) depends on the alkenes, the E-isomer being the major one. The reaction is tolerant to a wide variety of functional groups including other reactive olefins. Unlike the more ...
