Table 3.
Sulfide oxidation in uncommon media or solvent‐free systems.
|
Entry |
Type of sulfide |
Catalyst |
Oxidant |
Solvent |
Reaction conditions |
Scope and yield |
Ref. |
||
|---|---|---|---|---|---|---|---|---|---|
|
|
Ar−S‐Ar |
Ar−S‐alkyl |
alkyl‐S‐alkyl |
|
|
|
|
|
|
|
1 |
yes |
yes |
yes |
V2O5 (20 mol%) |
H2O2 (30 % aq) (2.5 equiv.) |
[C12mim][HSO4] |
RT–45 °C, 4–8 h |
10 examples 82–95 % |
[18a] |
|
2 |
yes |
yes |
yes |
– |
[pmim]IO4 (4 equiv.) |
[pmim]IO4 |
50 °C, 4–7 h |
25 examples 74–92 % |
[18b] |
|
3 |
yes |
yes |
yes |
– |
NaBrO3 (3.0 equiv.) |
[bmim]HSO4/H2O (3 : 1, v/v) |
80 °C, 20–55 min |
12 examples 83–92 % |
[18c] |
|
4 |
yes |
yes |
yes |
[C4mim][ReO4] (5 mol%) |
H2O2 (35 % aq) (4.0 equiv.) |
[C4mim][BF4] |
60 °C, 1–8 h |
15 examples 56–97 % |
[18d] |
|
5 |
yes |
yes |
yes |
– |
[SiO2]‐CH2CH2CO3H (2.0 equiv.) |
scCO2 (250 bar) |
flow condition: 0.10–0.12 mL scCO2 min−1, 40 °C, 3 h |
7 examples 72–99 % |
[18e] |
|
6 |
yes |
yes |
yes |
– |
oxone (1.5 equiv.) |
H2O |
60 °C, 12 h |
10 examples 88–97 % |
[18f] |
|
7 |
yes |
yes |
yes |
– |
nonanebis(peroxoic acid) (1.5 equiv.) |
H2O |
50–55 °C, 25 min |
9 examples 80–96 % |
[18g] |
|
8 |
yes |
yes |
yes |
– |
oxone (1.6 equiv.) |
mechanical milling |
90 min |
6 examples >97 % |
[18h] |
|
9 |
no |
yes |
yes |
– |
sodium perborate (3.0 equiv.) |
H2O |
MW irradiation, 90 °C, 45 min |
4 examples 39–99 % |
[18i] |
|
10 |
yes |
yes |
yes |
CuPcS@ASMNP (0.5 mol%) |
nBu4NHSO5 (3.0 equiv.) |
H2O |
RT, 60 min |
8 examples 70–97 % |
[18j] |