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Percentage yields of the compounds 5a–h and the corresponding reaction intermediates 2–4.
| Ar | 2 | 3 | 4 | 5a–d | 5e–h |
|---|---|---|---|---|---|
| C6H5- | 92 (2a) | 90 (3a) | 81 (4a) | 92 (5a) | 84 (5e) |
| 4-FC6H4- | 84 (2b) | 87 (3b) | 76 (4b) | 84 (5b) | 78 (5f) |
| 3-ClC6H4- | 85 (2c) | 82 (3c) | 73 (4c) | 85 (5c) | 80 (5g) |
| 4-MeOC6H4- | 77 (2d) | 80 (3d) | 76 (4d) | 77 (5d) | 52 (5h) |
