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| |||||
|---|---|---|---|---|---|
| Entry | Product | Cpd, yielda | Entry | Product | Cpd, yielda |
| 1 |
|
28, 60% | 7 |
|
34, 40% |
| 2 |
|
29, 72% | 8 |
|
35, 38% |
| 3 |
|
30, 65% | 9 |
|
36, 71% |
| 4 |
|
31, 50% | 10 |
|
37, N.D.b |
| 5 |
|
32, 34% | 11 |
|
38, N.D.b |
| 6 |
|
33, 59%c | |||
Cpd: compound number; yield is indicated as isolated product.
Not detected.
Overall yield after deprotection of THP ether in AcOH/THF/H2O (4/2/1) at 40 °C, 16 h.
