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(A) Growth of fluorescence intensity at 400 nm of the mixture of 1 (1 mM), 7 (10 µM), and Cu(OAc)2 (10 µM) in CH3OH over time with (red) or without (blue) pre-mixing azide 1 and Cu(OAc)2 for 2 h. (B) Product (8) generation over time monitored by 1H NMR with (red) or without (blue) pre-mixing azide 1 and Cu(OAc)2. Conditions: [1] = 10 mM, [7] = 10 mM, [Cu(OAc)2] = 1 mM in CD3CN.
