Table 2. [3 + 2] Cycloaddition of Azides and Alkynes Catalyzed by [Cu2(μ-Br)2(tBuImCH2pyCH2NEt2)]2 (5)i.

Reaction conditions: azide (0.5 mmol), alkyne (0.5 mmol), and catalyst 5 (0.0025 mmol, 0.5 mol %) at 298 K.
Conversion relative to azide determined by GC using mesitylene as an internal standard.
Isolated yields in parenthesis.
Azide (1.0 mmol).
Temperature 343 K.
