Li, Zhiping Li, Chao-Jun CuBr-Catalyzed Efficient Alkynylation of sp<sup>3</sup> C−H Bonds Adjacent to a Nitrogen Atom A simple and effective catalytic method to construct propargylamine was developed by using copper bromide and <i>tert</i>-BuOOH via a combination of sp<sup>3</sup> C−H bond and sp C−H bond activations followed by C−C bond formation. Nitrogen Atom;copper bromide;sp;bond 2004-09-29
    https://acs.figshare.com/articles/journal_contribution/CuBr_Catalyzed_Efficient_Alkynylation_of_sp_sup_3_sup_C_H_Bonds_Adjacent_to_a_Nitrogen_Atom/3323467
10.1021/ja0460763.s001