| S No | Starting material | Product | Reaction time | Yield |
| 1 |  |
 |
12 h | 28 % |
| 2 |  |
 |
30 min | 75 % |
| 3 |  |
 |
15 min | 95 % |
| 4 |  |
 |
5 h | 51 % |
| 5 |  |
 |
3 h | 80 % |
| 6 | NH3 |  |
10 h | 98 % |
|
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| Reaction condition: 1:1:0.1 Molar ratios of amine: Di-tert-butyl dicarbonate: Molecular sieves respectively at 20-25°C. | |||||||||||||||||||||||||||||||||||
| Table 1: Synthesized N-BOC protected amines. |
