Reduction of nitro compounds using β-CD-TiO2 in water.
| Entry | Nitro | Amine |
 Yielda
|
 Yieldb
|
 Yieldc (2 h) |
|---|---|---|---|---|---|
| 1 |
|
|
98 (3 h) | 100 (5 h) | 100 |
| 2 |
|
|
94 (4 h) | 97 (15 h) | 98 |
| 3 |
|
|
96 (3.5 h) | 95 (15 h) | 98 |
| 4 |
|
|
94 (3.5 h) | 96 (5 h) | 75 |
| 5 |
|
|
15 (3 h) | 10 (24 h) | 14 |
| 6 |
|
|
100 (3 h) | 98 (15 h) | 98 |
| 7 |
|
|
48 (3 h) | 25 (15 h) | 52 |
| 8 |
|
|
95 (3 h) | 97 (15 h) | 95 |
| 9 |
|
|
98 (3 h) | 94 (5 h) | 80 |
| 10 |
|
|
98 (3 h) | 97 (5 h) | 99 |
| 11 |
|
|
95 (3 h) | 96 (5 h) | 100 |
| 12 |
|
|
80 (3 h) | 80 (5 h) | 75 |
| 13 |
|
|
100 (3.5 h) | 98 (14 h) | 100 |
| 14 |
|
|
98 (3 h) | 99 (5 h) | 85 |
| 15 |
|
|
98 (3 h) | 76 (5 h) | 100 |
| 16 |
|
|
15 (3.5 h) | 5 (22 h) | 7 |
| 17 |
|
|
93 (3 h) | 94 (5 h) | 98 |
| 18d |
|
|
— | — | 85 (10 h) |
a
Reaction condition: TiO2-P25 (7.5 mg), β-cyclodextrin (0.15 g), nitro compound (1.2 mmol), irradiation with sunlight (1020–1070 Lux), Na2S (3.6 mmol).
b
Irradiation with blue LED (10 W), Na2S (3.6 mmol).
c
Irradiation with blue LED (10 W), Na2S (3.6 mmol), sonication time 2 h.
d
Large-scale reaction condition: TiO2-P25 (22 mg), nitro compound (6 mmol), irradiation with blue LED (10 W), Na2S (18 mmol), sonication time 10 h.