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. 2015 Feb 9;20(2):2837–2849. doi: 10.3390/molecules20022837

Figure 2.

Figure 2

Tests with different grinding auxiliary amounts. Reaction conditions: Octyl azide (1a) (1 mmol), phenylacetylene (2a) (1 mmol), Cu powder (1 mmol), SiO2; stainless steel jar (50 mL), 1500 small balls (Ø = 2 mm) and 48 medium balls (Ø = 5 mm).