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Macrocyclization Experiments.
| entry | macrocyclization experiment | ligand | dr | configuration of major diastereomer |
|---|---|---|---|---|
| 1 | T1 (8, Scheme 11) | PBu3 | >10:1 | (S) C13 |
| 2 | 14-epi-T1 (40, Scheme 20) | PBu3 | 8:1 | (S) C13 |
| 3 | T4 (9a, Scheme 17) | PBu3 | >10:1 | (S) C12 |
| 4 | T4 (9b, Scheme 17) | PBu3 | >10:1 | (S) C12 |
| 5 | T4 (9b, Scheme 19) |  |
>10:1 | (S) C12 |
| 6 | T4 (9b, Scheme 19) |  |
>10:1 | (S) C12 |
| 7 | 14-epi-T4 (41, Scheme 20) | PBu3 | n.a. | (macrocyclization not observed) |
