Facile and Convergent Synthesis of Highly Fused Oligosiloles by Rhodium‐Catalyzed Stitching Reaction

A facile and convergent synthesis of highly fused oligosiloles was achieved by utilizing the rhodium‐catalyzed stitching reaction, an efficient synthetic method for ladder‐type π‐conjugated compounds recently developed in our group. Up to 11 rings could be fused together through the formation of 8 new rings in one synthetic operation, and a series of oligosiloles containing up to 21 fused rings in one direction were synthesized. Electrochemical analysis of these compounds revealed that they could accept multiple electrons reversibly under reducing conditions. A facile and convergent synthesis of highly fused oligosiloles was achieved by utilizing the rhodium‐catalyzed stitching reaction, and up to 11 rings could be fused together through the formation of 8 new rings in one synthetic operation. Electrochemical analysis of these compounds revealed that they could accept multiple electrons reversibly under reducing conditions.