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Effects of α-Substitution on the Rate of Cysteamine Addition to Chalcones
| ||
|---|---|---|
| Entry | X = | k2 (M−1s−1) |
| 1 | CN (246) | 5700 |
| 2 | NO2 (247) | 750 |
| 3 | CF3 (248) | 17 |
| 4 | Br (249) | 2.9 |
| 5 | Cl (250) | 1.6 |
| 6 | p-NO2-Ph (251) | 0.29 |
| 7 | I (252) | 0.28 |
| 8 | CO2Et (253) | 0.28 |
| 9 | H (254) | 0.19 |
| 10 | F (255) | 0.017 |
| 11 | p-OMe-Ph (256) | 0.0086 |
| 12 | Me (257) | 0.0075 |
| 13 | Ph (258) | 0.0067 |
| 14 | CO2H (259) | 0.0037 |
