NBS-mediated synthesis of bromodihydroindolizino[8,7-b]indole derivatives

Abstract We have developed a mild NBS-mediated synthesis of 9-bromo-6,11-dihydro-5H-indolizino[8,7-b]indole derivatives. A series of brominated indolizino[8,7-b]indole derivatives can be obtained efficiently (up to 69% yield).