Distal‐Bond‐Selective C−C Activation of Ring‐Fused Cyclopentanones: An Efficient Access to Spiroindanones

A site‐selective rhodium‐catalyzed C−C activation of ring‐fused cyclopentanones was achieved to afford efficient access to a range of spiroindanones. The use of bulky 2‐amino‐6‐picoline as a cocatalyst is key to the excellent selectivity of this C−C bond cleavage in cyclopentanones.