Ni/Pd-catalyzed C–C cross-coupling reaction from phenylboronic acid and aldehydesa.
| ||||||
|---|---|---|---|---|---|---|
| Entry | R (alcohol or aldehyde) | Product | Time (h) | Yieldb (%) | ||
| From alcohola,c | From aldehyde | From alcohol | From aldehyde | |||
| 1 | H | 15a | 33 | 30 | 84 | 84 |
| 2 | 4-MeO | 15b | 36 | 34 | 77 | 79 |
| 3 | 4-Me | 15c | 36 | 34 | 73 | 75 |
| 4 | 2-Me | 15d | 32 | 30 | 75 | 75 |
| 5 | 4-CN | 15e | 28 | 28 | 66 | 60 |
| 6 | 4-NO2 | 15f | 30 | 30 | 74 | 77 |
| 7 | 1-Naphthyl | 15g | 40 | 36 | 70 | 74 |
| 8 | 4-Cl | 15h | 35 | 33 | 25d | 35e |
| 9 | 2-MeO | 15i | 36 | 35 | 70 | 70 |
| 10 | 4-NO2, 2-Me | 15j | 40 | 36 | 78 | 75 |
| 11 | Nicotine | 15k | 28 | 24 | 80 | 82 |
| 12 | Picoline | 15l | 28 | 26 | 82 | 80 |
| 13 | 2-Furfuryl | 15m | 40 | 35 | 65 | 80 |
Reaction conditions: aldehyde or benzyl alcohol (1.0 mmol), phenylboronic acid (1.0 mmol), catalyst 11 (1.0 mg, 0.013 mol% Pd, 0.034 mol% Ni), DMSO2 (3.36 g, 35.7 mmol), and 120 °C.
Isolated yield.
O2 balloon (∼1.0 atm).
45% coupling product was takes place through Cl (major product).
33% coupling product was takes place through Cl (major product).