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 |