Micellar catalysis: a green solution to enable undirected and mild C-H activation of (oligo)thiophenes at the challenging β-position.

The unexpected potential of micellar medium to achieve challenging β-selective direct arylation of (oligo)thiophenes is reported. Thanks to the use of a water/surfactant solution in combination with natural feedstock-derived undecanoic acid as an additive, this high-yielding C-H coupling could be performed regioselectively at room temperature.