Table 2.
Deprotection of PMB Esters with Chromium-based Reagents
| ||||
|---|---|---|---|---|
|
| ||||
| Entry | Ar | Reagent | Time | Yield |
| 1 | Ph | 98 | 5 h | 70% |
| 2 | Ph | 99 | 5 h | 70% |
| 3 | 4-NO2-Ph | 98 | 1 h | 40% |
| 4 | 4-Cl-Ph | 98 | 5 h | 75% |
| 5 | 4-Cl-Ph | 99 | 5 h | 30% |
| 6 | 2-Me-Ph | 98 | 5 h | 30% |
| 7 | 2-Me-Ph | 99 | 5 h | 35% |
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