Enol Phosphinates and Phosphonates: Practical Electrophiles for Cross-Coupling Strategies

Enol phosphinates and phosphonates can be readily prepared from simple lactams in high yields and are both stable and storable. Both these substrates can be employed successfully in homogeneous Suzuki-Miyaura and Stille cross-couplings protocols. Additionally, the phosphonate group can be immobilised on a phenol-on-polystyrene resin and utilised in a simple diversity linker strategy in which the coupled product is cleaved from the resin under Suzuki-Miyaura cross-coupling conditions.