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| Ar | dra | % yieldb | % yield (2 steps)b | % yieldb |
|---|---|---|---|---|
| phenyl | >19:1 | 99 (9) | 87 (13) | 99 (L6) |
| 1-naphthyl | 12:1 | 90 (10) | 87 (14) | 95 (L7) |
| 2-naphthyl | >19:1 | 61 (11) | 41 (15) | 84 (L8) |
| 4-biphenyl | >19:1 | 20 (12) | 77 (16) | 80 (L9) |
Determined by analysis of the 1H NMR spectrum of the crude material.
Isolated yield.
