Table 1.
General structure and yields of the final compounds 12a–n.
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Comp. | n | R | Yield 1 | Comp. | n | R | Yield 1 |
12a | 1 | H | 71% | 12h | 2 | H | 64% |
12b | 1 | 4-F | 74% | 12i | 2 | 4-F | 59% |
12c | 1 | 4-Cl | 77% | 12j | 2 | 4-Cl | 59% |
12d | 1 | 4-Br | 70% | 12k | 2 | 4-Br | 64% |
12e | 1 | 4-CF3 | 62% | 12l | 2 | 4-CF3 | 69% |
12f | 1 | 4-OCH3 | 81% | 12m | 2 | 4-OCH3 | 70% |
12g | 1 | 4-CH3 | 52% | 12n | 2 | Fused benzene | 72% |
1 Isolated yield after silica gel column chromatography.