Synthetic studies on bradykinin antagonist martinellines: construction of a pyrrolo[3,2-c]quinoline skeleton using silicon-tether RCM reaction and allylic amination

The pyrrolo[3,2-c]quinoline consisting of a core structure of martinellines, the first naturally occurring heterocycle, was prepared through silicon-tether ring-closing metathesis reaction and intramolecular allylic amination as key steps.