Li, Zhiping; Li, Chao-Jun . (2005). CuBr-Catalyzed Direct Indolation of Tetrahydroisoquinolines via Cross-Dehydrogenative Coupling between sp
<sup>3</sup>
C−H and sp
<sup>2</sup>
C−H Bonds. Journal of the American Chemical Society, 127(19), 6968–6969.
doi:10.1021/ja0516054
