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Low energy conformations of selected analogs, calculated as described in the text and experimental section. Predicted intramolecular hydrogen bonds are indicated with dashed lines.
 | ||
|---|---|---|
| Compound | R1 |
Low energy conformation |
| 2 |
|
|
| 4 |
|
|
| 5 |
|
|
| 9 |
|
|
| 11 |
|
|
 | ||
|---|---|---|
| 14 |
|
|
| 15 |
|
|
| 16 |
|
|
