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Effect of chain length on reaction efficiencya.
 | |||||
|---|---|---|---|---|---|
| Compounds | 3r (n = 0) | 3s (n = 1) | 3a (n = 2) | 3t (n = 3) | 3u (n = 4) |
| TS ring size | 3 | 4 | 5 | 6 | 7 |
| Yield (%) | 0 | 0 | 84 | 59 | 0 |
aCited yields are for the isolated material following chromatography. Reaction conditions: 1 (2.0 eq., 0.2 mmol), 2a (1.0 eq., 0.1 mmol), fac-Ir(ppy)3 (1.0 mol%), TMP (3.0 eq., 0.3 mmol), B2Pin2 (3.0 eq., 0.3 mmol), DCE 1.0 mL, 25 °C, N2, 455 nm, 24 h.
