Platinum-catalyzed 1,3-acyloxy migration/[1,5]-hydride transfer/cycloaddition sequence: synthesis of ring-fused tetrahydroquinolines

An efficient construction of multifunctionalized ring-fused tetrahydroquinolines viaplatinum-catalyzed C–H functionalization is presented. A sequence involving 1,3-OAc migration, [1,5]-hydride shift and then cyclization takes place to produce ring-fused tetrahydroquinolines. The reaction mechanism has been confirmed by a deuterium-labeling experiment.