Yasutomo Segawa, Takehisa Maekawa, Kenichiro Itami

Angew. Chem. Int. Ed., 2014, Early View. DOI: 10.1002/anie.201403729

Activation of aromatic C–H bonds by a transition metal catalyst has received significant attention in the synthetic chemistry community. In recent years, rapid and site-selective extension of π-electron systems by C–H activation has emerged as an ideal methodology for preparing organic materials with extended π-systems. This Review focuses on recently reported π-extending C–H activation reactions directed toward new optoelectronic conjugated materials.