Table 5.
6-exo-dig cyclization of sulfonamide 7.
 | ||||
| entry | Ligand | time (h) |
convn. (%)a |
yield of 8 (%)a,b |
| 1 | L1 | 2 | 100 | 100 (91) |
| 2 | X-Phos | 12 | 76 | 76 (70) |
| 3 | IPr | 12 | 68 | 67 (58) |
aDetermined by 1H NMR. bIsolated yield in the parentheses.
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