Ligand‐Free Suzuki–Miyaura Cross‐Coupling Reactions in Deep Eutectic Solvents: Synthesis of Benzodithiophene Derivatives and Study of their Optical and Electrochemical Performance

We report that dihalogeno‐substituted benzodithiophenes ( BDTs ) undergo a smooth ligand‐free Suzuki–Miyaura cross‐coupling reaction, under air and moderate heating (60 °C), with aryl‐, alkenyl‐ and alkynyltrifluoroborate salts in a biodegradable choline chloride‐based eutectic mixture, thereby granting access to valuable π‐conjugated BDT compounds (up to 79 % yield), which are gaining great interest in the field of material sciences. The...