-(2-bromobenzoyl)indoles is described. This organotin-based protocol provides fused indoline derivatives bearing contiguous quaternary carbon stereocenters at the C2 and C3 positions in moderate to excellent yields and is compatible with structurally diverse organotin reagents, including aryl-, naphthyl-, vinyl ether-, alkenyl-, and alkyl-substituted stannanes. Moreover, this protocol is characterized by mild conditions and gram-scale scalability.
Qi et al. (Thu,) studied this question.