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Substitution pattern and percentage yields of 2a–i and 3a–i.
| Entry | R | %Yield 2a–i | %Yield 3a–i |
|---|---|---|---|
| 1 | C6H5- | 61 (2a) | 61 (3a) |
| 2 | 3-FC6H4- | 64 (2b) | 59 (3b) |
| 3 | 4-FC6H4- | 71 (2c) | 68 (3c) |
| 4 | 3-ClC6H4- | 69 (2d) | 65 (3d) |
| 5 | 4-ClC6H4- | 66 (2e) | 60 (3e) |
| 6 | 4-MeOC6H4- | 60 (2f) | 78 (3f) |
| 7 | 3,5-MeO(C6H3)- | 71 (2g) | 63 (3g) |
| 8 | 4-MeC6H4- | 76 (2h) | 74 (3h) |
| 9 | -Cyclohex-1-en-1-yl | 74 (2i) | 62 (3i) |
