A Modular Synthesis of Teraryl‐Based α‐Helix Mimetics, Part 4: Core Fragments with Two Halide Leaving Groups Featuring Side Chains of Proteinogenic Amino Acids
A series of para-bromoiodoarene compounds decorated with the sidechains of all proteinogenic amino acids is reported. These fragments serve as building blocks for the modular assembly of teraryl-based α-helix mimetics via sequential Pd cross-coupling. Compared to our established iodotriflate approach, the new building blocks showed higher stability and better reactivity under cross-coupling conditions