Entry Variation from the standard conditions Yield (%)b
1 None 89
2 DMSO/H2O (2:1, 6 mL) 61
3 THF/H2O (2:1, 6 mL) 53
4 MeCN/H2O (3:1, 8 mL) 80
5 MeCN/H2O (1:1, 6 mL) 75
6 MeCN (6 mL) 64
7 NaI, NH4I, KI, n-Bu4NBr instead of TBAI 69, 65, 72, 40
8 Pt (+) ǀ Pt (-) instead of C (+) ǀ C (-) 37
9 GF (+) ǀ GF (-) instead of C (+) ǀ C (-) 31
10 C (+) ǀ Pt (-) instead of C (+) ǀ C (-) 50
11 5 mA, 15 mA instead of 10 mA 42, 80
12 9 h instead of 12 h 71
13 Under air trace
14 Without TBAI n.d.
15 No current n.d.
16 Large-scale reaction 72