Copper-promoted N-cyanation of aliphatic sec-amine by CuCN is achieved via oxidative coupling. This procedure employs O2 as a clean oxidant. Notably, sulfoximines and 1,1,3,3-tetramethylguanidine also worked well in this procedure. Thus, it represents a key progress in the C–N bond formation reaction as well as in the cyanation reaction.
F. Teng, J. Yu, Y. Jiang, H. Yang and J. Cheng, Chem. Commun., 2014, 50, 8412 DOI: 10.1039/C4CC03439B
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